Subtract 14/15 from 12/40, Solve 12/40

Subtract 14/15 from 12/40

12/40 - 14/15 is -19/30.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
12/40 = 12 × 3/40 × 3 = 36/120
Likewise, for the 2nd fraction, since 15 × 8 = 120,
14/15 = 14 × 8/15 × 8 = 112/120
Subtract the two like fractions:
36/120 - 112/120 = 36 - 112/120 = -76/120
After reducing the fraction, the answer is -19/30

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