Subtract 7/21 from 3/60
3/60 - 7/21 is -17/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
3/60 = 3 × 7/60 × 7 = 21/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
7/21 = 7 × 20/21 × 20 = 140/420 - Subtract the two like fractions:
21/420 - 140/420 = 21 - 140/420 = -119/420 - After reducing the fraction, the answer is -17/60
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