Subtract 8/70 from 28/18, Solve 1 10/18

Subtract 8/70 from 28/18

1^st number: 1 10/18, 2^nd number: 8/70

28/18 - 8/70 is 454/315.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 18 × 35 = 630,
28/18 = 28 × 35/18 × 35 = 980/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
8/70 = 8 × 9/70 × 9 = 72/630
Subtract the two like fractions:
980/630 - 72/630 = 980 - 72/630 = 908/630
After reducing the fraction, the answer is 454/315
In mixed form: 1139/315

MathStep (Works offline)

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