Subtract 5/40 from 90/25, Solve 3 15/25

Subtract 5/40 from 90/25

1^st number: 3 15/25, 2^nd number: 5/40

90/25 - 5/40 is 139/40.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 40 is 200

Next, find the equivalent fraction of both fractional numbers with denominator 200
For the 1st fraction, since 25 × 8 = 200,
90/25 = 90 × 8/25 × 8 = 720/200
Likewise, for the 2nd fraction, since 40 × 5 = 200,
5/40 = 5 × 5/40 × 5 = 25/200
Subtract the two like fractions:
720/200 - 25/200 = 720 - 25/200 = 695/200
After reducing the fraction, the answer is 139/40
In mixed form: 319/40

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