Subtract 4/36 from 30/28, Solve 1 2/28

Subtract 4/36 from 30/28

1^st number: 1 2/28, 2^nd number: 4/36

30/28 - 4/36 is 121/126.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 28 × 9 = 252,
30/28 = 30 × 9/28 × 9 = 270/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
4/36 = 4 × 7/36 × 7 = 28/252
Subtract the two like fractions:
270/252 - 28/252 = 270 - 28/252 = 242/252
After reducing the fraction, the answer is 121/126

MathStep (Works offline)

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