Subtract 21/7 from 15/60
1st number: 15/60, 2nd number: 3 0/7
15/60 - 21/7 is -11/4.
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,
15/60 = 15 × 7/60 × 7 = 105/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
21/7 = 21 × 60/7 × 60 = 1260/420 - Subtract the two like fractions:
105/420 - 1260/420 = 105 - 1260/420 = -1155/420 - After reducing the fraction, the answer is -11/4
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