Subtract 15/12 from 10/40, Solve 10/40

Subtract 15/12 from 10/40

1^st number: 10/40, 2^nd number: 1 3/12

10/40 - 15/12 is -1/1.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
10/40 = 10 × 3/40 × 3 = 30/120
Likewise, for the 2nd fraction, since 12 × 10 = 120,
15/12 = 15 × 10/12 × 10 = 150/120
Subtract the two like fractions:
30/120 - 150/120 = 30 - 150/120 = -120/120
After reducing the fraction, the answer is -1/1

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