Subtract 98/80 from 14/21, Solve 14/21

Subtract 98/80 from 14/21

1^st number: 14/21, 2^nd number: 1 18/80

14/21 - 98/80 is -67/120.

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,
14/21 = 14 × 80/21 × 80 = 1120/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
98/80 = 98 × 21/80 × 21 = 2058/1680
Subtract the two like fractions:
1120/1680 - 2058/1680 = 1120 - 2058/1680 = -938/1680
After reducing the fraction, the answer is -67/120

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