Subtract 5/80 from 8/21, Solve 8/21

Subtract 5/80 from 8/21

8/21 - 5/80 is 107/336.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 21 × 80 = 1680,
8/21 = 8 × 80/21 × 80 = 640/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
5/80 = 5 × 21/80 × 21 = 105/1680
Subtract the two like fractions:
640/1680 - 105/1680 = 640 - 105/1680 = 535/1680
After reducing the fraction, the answer is 107/336

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