Subtract 21/40 from 4/63
4/63 - 21/40 is -1163/2520.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 63 × 40 = 2520,
4/63 = 4 × 40/63 × 40 = 160/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
21/40 = 21 × 63/40 × 63 = 1323/2520 - Subtract the two like fractions:
160/2520 - 1323/2520 = 160 - 1323/2520 = -1163/2520
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