2. Write the number as a proper fraction.
- 0.0078125 can be written as a proper fraction.
- A proper fraction = the numerator is smaller than the denominator..
Write down the number divided by 1, as a fraction:
0.0078125 = 0.0078125/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 10,000,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
0.0078125/1 =
(0.0078125 × 10,000,000)/(1 × 10,000,000) =
78,125/10,000,000
3. Reduce (simplify) the fraction above:
78,125/10,000,000
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).
78,125 = 57
10,000,000 = 27 × 57
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (57; 27 × 57) = 57
Divide both the numerator and the denominator by their GCF.
78,125/10,000,000 =
57/(27 × 57) =
(57 ÷ 57) / ((27 × 57) ÷ 57) =
1/27 =
1/128