Subtract 14/72 from 40/42, Solve 40/42

Subtract 14/72 from 40/42

40/42 - 14/72 is 191/252.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 42 × 12 = 504,
40/42 = 40 × 12/42 × 12 = 480/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
14/72 = 14 × 7/72 × 7 = 98/504
Subtract the two like fractions:
480/504 - 98/504 = 480 - 98/504 = 382/504
After reducing the fraction, the answer is 191/252

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