Subtract 54/84 from 7/40
7/40 - 54/84 is -131/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
7/40 = 7 × 21/40 × 21 = 147/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
54/84 = 54 × 10/84 × 10 = 540/840 - Subtract the two like fractions:
147/840 - 540/840 = 147 - 540/840 = -393/840 - After reducing the fraction, the answer is -131/280
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