Subtract 14/80 from 3/42, Solve 3/42

Subtract 14/80 from 3/42

3/42 - 14/80 is -29/280.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 42 × 40 = 1680,
3/42 = 3 × 40/42 × 40 = 120/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
14/80 = 14 × 21/80 × 21 = 294/1680
Subtract the two like fractions:
120/1680 - 294/1680 = 120 - 294/1680 = -174/1680
After reducing the fraction, the answer is -29/280

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