Subtract 72/80 from 2/42
2/42 - 72/80 is -179/210.
Steps for subtracting fractions
- 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,
2/42 = 2 × 40/42 × 40 = 80/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
72/80 = 72 × 21/80 × 21 = 1512/1680 - Subtract the two like fractions:
80/1680 - 1512/1680 = 80 - 1512/1680 = -1432/1680 - After reducing the fraction, the answer is -179/210
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