Subtract 3/24 from 20/21
20/21 - 3/24 is 139/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
3/24 = 3 × 7/24 × 7 = 21/168 - Subtract the two like fractions:
160/168 - 21/168 = 160 - 21/168 = 139/168
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