Subtract 21/63 from 4/40
4/40 - 21/63 is -7/30.
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,
4/40 = 4 × 63/40 × 63 = 252/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
21/63 = 21 × 40/63 × 40 = 840/2520 - Subtract the two like fractions:
252/2520 - 840/2520 = 252 - 840/2520 = -588/2520 - After reducing the fraction, the answer is -7/30
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