Subtract 3/7 from 21/60
21/60 - 3/7 is -11/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
3/7 = 3 × 60/7 × 60 = 180/420 - Subtract the two like fractions:
147/420 - 180/420 = 147 - 180/420 = -33/420 - After reducing the fraction, the answer is -11/140
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