Subtract 5/72 from 42/49, Solve 42/49

Subtract 5/72 from 42/49

42/49 - 5/72 is 397/504.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 72 is 3528

Next, find the equivalent fraction of both fractional numbers with denominator 3528
For the 1st fraction, since 49 × 72 = 3528,
42/49 = 42 × 72/49 × 72 = 3024/3528
Likewise, for the 2nd fraction, since 72 × 49 = 3528,
5/72 = 5 × 49/72 × 49 = 245/3528
Subtract the two like fractions:
3024/3528 - 245/3528 = 3024 - 245/3528 = 2779/3528
After reducing the fraction, the answer is 397/504

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