Subtract 18/20 from 40/63
40/63 - 18/20 is -167/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
40/63 = 40 × 20/63 × 20 = 800/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Subtract the two like fractions:
800/1260 - 1134/1260 = 800 - 1134/1260 = -334/1260 - After reducing the fraction, the answer is -167/630
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