Subtract 81/60 from 24/40, Solve 24/40

Subtract 81/60 from 24/40

1^st number: 24/40, 2^nd number: 1 21/60

24/40 - 81/60 is -3/4.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 60 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
24/40 = 24 × 3/40 × 3 = 72/120
Likewise, for the 2nd fraction, since 60 × 2 = 120,
81/60 = 81 × 2/60 × 2 = 162/120
Subtract the two like fractions:
72/120 - 162/120 = 72 - 162/120 = -90/120
After reducing the fraction, the answer is -3/4

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