Subtract 15/42 from 14/20, Solve 14/20

Subtract 15/42 from 14/20

14/20 - 15/42 is 12/35.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
14/20 = 14 × 21/20 × 21 = 294/420
Likewise, for the 2nd fraction, since 42 × 10 = 420,
15/42 = 15 × 10/42 × 10 = 150/420
Subtract the two like fractions:
294/420 - 150/420 = 294 - 150/420 = 144/420
After reducing the fraction, the answer is 12/35

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