Subtract 45/8 from 90/25, Solve 3 15/25

Subtract 45/8 from 90/25

1^st number: 3 15/25, 2^nd number: 5 5/8

90/25 - 45/8 is -81/40.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 8 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 8 × 25 = 200,
45/8 = 45 × 25/8 × 25 = 1125/200
Subtract the two like fractions:
720/200 - 1125/200 = 720 - 1125/200 = -405/200
After reducing the fraction, the answer is -81/40

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