2. Write the mixed repeating (recurring) decimal number as a proper fraction.
0.0606060609 can be written as a proper fraction.
- The numerator is smaller than the denominator.
Set up the first equation.
- Let y equal the decimal number:
y = 0.0606060609
Set up the second equation.
- Number of decimal places repeating: 1
Multiply both sides of the first equation by 101 = 10
y = 0.0606060609
10 × y = 10 × 0.0606060609
10 × y = 0.606060609
Get the same number of decimal places as for y:
10 × y = 0.6060606099
Note: 0.6060606099 = 0.606060609
Subtract the first equation from the second one.
- Having the same number of decimal places ...
- The repeating pattern drops off by subtracting the two equations.
10 × y - y = 0.6060606099 - 0.0606060609 ⇒
(10 - 1) × y = 0.6060606099 - 0.0606060609 ⇒
We now have a new equation:
9 × y = 0.545454549
Solve for y in the new equation.
9 × y = 0.545454549 ⇒
y = 0.545454549/9
Let the result written as a fraction.
Now we can write the number as a fraction.
According to our first equation:
y = 0.0606060609
According to our calculations:
y = 0.545454549/9
⇒ 0.0606060609 = 0.545454549/9
Get rid of the decimal places in the fraction above.
- Multiply the top and the bottom number by 1,000,000,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
0.0606060609 = (0.545454549 × 1,000,000,000)/(9 × 1,000,000,000)
0.0606060609 = 545,454,549/9,000,000,000
3. Reduce (simplify) the fraction above:
545,454,549/9,000,000,000
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).
545,454,549 = 32 × 60,606,061
9,000,000,000 = 29 × 32 × 59
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (32 × 60,606,061; 29 × 32 × 59) = 32
Divide both the numerator and the denominator by their GCF.
545,454,549/9,000,000,000 =
(32 × 60,606,061)/(29 × 32 × 59) =
((32 × 60,606,061) ÷ 32) / ((29 × 32 × 59) ÷ 32) =
60,606,061/(29 × 59) =
60,606,061/1,000,000,000