Subtract 21/70 from 16/60
16/60 - 21/70 is -1/30.
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,
16/60 = 16 × 7/60 × 7 = 112/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
21/70 = 21 × 6/70 × 6 = 126/420 - Subtract the two like fractions:
112/420 - 126/420 = 112 - 126/420 = -14/420 - After reducing the fraction, the answer is -1/30
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