Subtract 6/72 from 20/70, Solve 20/70

Subtract 6/72 from 20/70

20/70 - 6/72 is 17/84.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 70 × 36 = 2520,
20/70 = 20 × 36/70 × 36 = 720/2520
Likewise, for the 2nd fraction, since 72 × 35 = 2520,
6/72 = 6 × 35/72 × 35 = 210/2520
Subtract the two like fractions:
720/2520 - 210/2520 = 720 - 210/2520 = 510/2520
After reducing the fraction, the answer is 17/84

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