Subtract 21/30 from 40/60
40/60 - 21/30 is -1/30.
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,
40/60 = 40 × 1/60 × 1 = 40/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Subtract the two like fractions:
40/60 - 42/60 = 40 - 42/60 = -2/60 - After reducing the fraction, the answer is -1/30
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