Subtract 72/7 from 21/60
1st number: 21/60, 2nd number: 10 2/7
21/60 - 72/7 is -1391/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 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 7 × 60 = 420,
72/7 = 72 × 60/7 × 60 = 4320/420 - Subtract the two like fractions:
147/420 - 4320/420 = 147 - 4320/420 = -4173/420 - After reducing the fraction, the answer is -1391/140
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