Subtract 56/70 from 21/60
21/60 - 56/70 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 70 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 70 × 6 = 420,
56/70 = 56 × 6/70 × 6 = 336/420 - Subtract the two like fractions:
147/420 - 336/420 = 147 - 336/420 = -189/420 - After reducing the fraction, the answer is -9/20
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