Subtract 90/25 from 9/24, Solve 9/24

Subtract 90/25 from 9/24

1^st number: 9/24, 2^nd number: 3 15/25

9/24 - 90/25 is -129/40.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 25 is 600

Next, find the equivalent fraction of both fractional numbers with denominator 600
For the 1st fraction, since 24 × 25 = 600,
9/24 = 9 × 25/24 × 25 = 225/600
Likewise, for the 2nd fraction, since 25 × 24 = 600,
90/25 = 90 × 24/25 × 24 = 2160/600
Subtract the two like fractions:
225/600 - 2160/600 = 225 - 2160/600 = -1935/600
After reducing the fraction, the answer is -129/40

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