Subtract 6/72 from 10/21, Solve 10/21

Subtract 6/72 from 10/21

10/21 - 6/72 is 11/28.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 21 × 24 = 504,
10/21 = 10 × 24/21 × 24 = 240/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
6/72 = 6 × 7/72 × 7 = 42/504
Subtract the two like fractions:
240/504 - 42/504 = 240 - 42/504 = 198/504
After reducing the fraction, the answer is 11/28

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