Subtract 60/70 from 72/45, Solve 1 27/45

Subtract 60/70 from 72/45

1^st number: 1 27/45, 2^nd number: 60/70

72/45 - 60/70 is 26/35.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 45 × 14 = 630,
72/45 = 72 × 14/45 × 14 = 1008/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
60/70 = 60 × 9/70 × 9 = 540/630
Subtract the two like fractions:
1008/630 - 540/630 = 1008 - 540/630 = 468/630
After reducing the fraction, the answer is 26/35

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad