Subtract 21/30 from 7/12
7/12 - 21/30 is -7/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
7/12 = 7 × 5/12 × 5 = 35/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Subtract the two like fractions:
35/60 - 42/60 = 35 - 42/60 = -7/60
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