Convert the decimal number 1.25. Turn it into a reduced (simplified) improper fraction, into a mixed number and write it as a percentage value. Equivalent fractions calculator

Convert 1.25 into equivalent fractions and write it as a percentage value

1. Write the number as a percentage.

  • Multiply the number by 100/100
  • Note: 100/100 = 1
  • The value of the number does not change when multiplying by 100/100

1.25 =

1.25 × 100/100 =

(1.25 × 100)/100 =

125/100 =

125%


  • In other words:
  • Multiply the number by 100...
  • ... And then add the percent sign, %
  • 1.25 = 125%

» Convert fractions to percentages, online calculator


2. Write the number as an improper fraction.

  • 1.25 can be written as an improper fraction.
  • An improper fraction = the numerator is larger than or equal to the denominator..

Write down the number divided by 1, as a fraction:

1.25 = 1.25/1


Turn the top number into a whole number.

  • Multiply both the top and the bottom by the same number.
  • This number is: 100.
  • 1 followed by as many 0-s as the number of digits after the decimal point.

1.25/1 =

(1.25 × 100)/(1 × 100) =

125/100


3. Reduce (simplify) the fraction above:
125/100
to the lowest terms, to its simplest equivalent form, irreducible.

To reduce a fraction to the lowest terms divide the numerator and denominator by their greatest (highest) common factor (divisor), GCF.


Factor the numerator and denominator (prime factorization).

125 = 53

100 = 22 × 52


» Prime factorization: break numbers down to prime factors, online calculator


Calculate the greatest (highest) common factor (divisor), GCF.

Multiply all the common prime factors by the lowest exponents.

GCF (53; 22 × 52) = 52


» Calculate the greatest (highest) common factor (divisor), GCF, online calculator


Divide both the numerator and the denominator by their GCF.

125/100 =

53/(22 × 52) =

(53 ÷ 52) / ((22 × 52) ÷ 52) =

5/22 =

5/4


4. The fraction is an improper one, rewrite it as a mixed number (mixed fraction):

  • A mixed number = an integer number and a proper fraction, of the same sign.
  • Example 1: 2 1/5; Example 2: - 1 3/7.
  • A proper fraction = the numerator is smaller than the denominator.

5 ÷ 4 = 1, remainder = 1 ⇒

5 = 1 × 4 + 1 ⇒

5/4 =

(1 × 4 + 1) / 4 =

(1 × 4) / 4 + 1/4 =

1 + 1/4 =

1 1/4


5/4 ~ Equivalent fractions.

  • The above fraction cannot be reduced.
  • That is, it has the smallest possible numerator and denominator.

  • By expanding it we can build up equivalent fractions.

  • Multiply the numerator & the denominator by the same number.


Example 1. By expanding the fraction by 3.

5/4 = (5 × 3)/(4 × 3) = 15/12

Example 2. By expanding the fraction by 7.

5/4 = (5 × 7)/(4 × 7) = 35/28

  • Of course, the above fractions are reducing...
  • ... to the initial fraction: 5/4

» Reduce fractions and write them as decimal numbers and percentages


:: Final answer ::
Written in 4 different ways

As a reduced (simplified) positive improper fraction:
1.25 = 5/4

As a mixed number:
1.25 = 1 1/4

As a percentage:
1.25 = 125%

As equivalent fractions:
1.25 = 5/4 = 15/12 = 35/28

More operations of this kind

1.26 = ? Convert the decimal number 1.26. Turn it into a reduced (simplified) improper fraction, into a mixed number and write it as a percentage. Calculate other equivalent fractions to the decimal number, by expanding

Decimal numbers to fractions and percentages, calculator

Learn how to turn a decimal number into a fraction and a percentage. Steps.

1. How to write the number as a percentage:

  • Multiply the number by 100. Then add the percent sign, %.

2. How to write the number as a fraction:

  • Write down the number divided by 1, as a fraction.
  • Turn the top number into a whole number: multiply both the top and the bottom by the same number.
  • Reduce (simplify) the above fraction to the lowest terms, to its simplest equivalent form, irreducible. To reduce a fraction divide the numerator and the denominator by their greatest (highest) common factor (divisor), GCF.
  • If the fraction is an improper one, rewrite it as a mixed number (mixed fraction).
  • Calculate equivalent fractions. By expanding it we can build up equivalent fractions: multiply the numerator & the denominator by the same number.

More on ordinary (common) fractions / theory: