Subtract 18/63 from 21/60
21/60 - 18/63 is 9/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
21/60 = 21 × 21/60 × 21 = 441/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
18/63 = 18 × 20/63 × 20 = 360/1260 - Subtract the two like fractions:
441/1260 - 360/1260 = 441 - 360/1260 = 81/1260 - After reducing the fraction, the answer is 9/140
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