Subtract 28/30 from 21/60
21/60 - 28/30 is -7/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Subtract the two like fractions:
21/60 - 56/60 = 21 - 56/60 = -35/60 - After reducing the fraction, the answer is -7/12
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