Subtract 42/63 from 1/40
1/40 - 42/63 is -77/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
1/40 = 1 × 63/40 × 63 = 63/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
42/63 = 42 × 40/63 × 40 = 1680/2520 - Subtract the two like fractions:
63/2520 - 1680/2520 = 63 - 1680/2520 = -1617/2520 - After reducing the fraction, the answer is -77/120
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