Subtract 36/42 from 54/80
54/80 - 36/42 is -51/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
54/80 = 54 × 21/80 × 21 = 1134/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
36/42 = 36 × 40/42 × 40 = 1440/1680 - Subtract the two like fractions:
1134/1680 - 1440/1680 = 1134 - 1440/1680 = -306/1680 - After reducing the fraction, the answer is -51/280
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