Subtract 9/7 from 90/25, Solve 3 15/25

Subtract 9/7 from 90/25

1^st number: 3 15/25, 2^nd number: 1 2/7

90/25 - 9/7 is 81/35.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175

Next, find the equivalent fraction of both fractional numbers with denominator 175
For the 1st fraction, since 25 × 7 = 175,
90/25 = 90 × 7/25 × 7 = 630/175
Likewise, for the 2nd fraction, since 7 × 25 = 175,
9/7 = 9 × 25/7 × 25 = 225/175
Subtract the two like fractions:
630/175 - 225/175 = 630 - 225/175 = 405/175
After reducing the fraction, the answer is 81/35
In mixed form: 211/35

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