Subtract 25/50 from 90/28, Solve 3 6/28

Subtract 25/50 from 90/28

1^st number: 3 6/28, 2^nd number: 25/50

90/28 - 25/50 is 19/7.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 50 is 700

Next, find the equivalent fraction of both fractional numbers with denominator 700
For the 1st fraction, since 28 × 25 = 700,
90/28 = 90 × 25/28 × 25 = 2250/700
Likewise, for the 2nd fraction, since 50 × 14 = 700,
25/50 = 25 × 14/50 × 14 = 350/700
Subtract the two like fractions:
2250/700 - 350/700 = 2250 - 350/700 = 1900/700
After reducing the fraction, the answer is 19/7
In mixed form: 25/7

MathStep (Works offline)

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