Subtract 27/80 from 9/42
9/42 - 27/80 is -69/560.
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,
9/42 = 9 × 40/42 × 40 = 360/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
27/80 = 27 × 21/80 × 21 = 567/1680 - Subtract the two like fractions:
360/1680 - 567/1680 = 360 - 567/1680 = -207/1680 - After reducing the fraction, the answer is -69/560
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