Subtract 28/32 from 90/25, Solve 3 15/25

Subtract 28/32 from 90/25

1^st number: 3 15/25, 2^nd number: 28/32

90/25 - 28/32 is 109/40.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 32 is 800

Next, find the equivalent fraction of both fractional numbers with denominator 800
For the 1st fraction, since 25 × 32 = 800,
90/25 = 90 × 32/25 × 32 = 2880/800
Likewise, for the 2nd fraction, since 32 × 25 = 800,
28/32 = 28 × 25/32 × 25 = 700/800
Subtract the two like fractions:
2880/800 - 700/800 = 2880 - 700/800 = 2180/800
After reducing the fraction, the answer is 109/40
In mixed form: 229/40

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