Subtract 1/63 from 21/40
21/40 - 1/63 is 1283/2520.
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,
21/40 = 21 × 63/40 × 63 = 1323/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
1/63 = 1 × 40/63 × 40 = 40/2520 - Subtract the two like fractions:
1323/2520 - 40/2520 = 1323 - 40/2520 = 1283/2520
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