Subtract 21/35 from 8/72, Solve 8/72

Subtract 21/35 from 8/72

8/72 - 21/35 is -22/45.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 35 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 72 × 35 = 2520,
8/72 = 8 × 35/72 × 35 = 280/2520
Likewise, for the 2nd fraction, since 35 × 72 = 2520,
21/35 = 21 × 72/35 × 72 = 1512/2520
Subtract the two like fractions:
280/2520 - 1512/2520 = 280 - 1512/2520 = -1232/2520
After reducing the fraction, the answer is -22/45

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