Subtract 72/21 from 15/6
1st number: 2 3/6, 2nd number: 3 9/21
15/6 - 72/21 is -13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
15/6 = 15 × 7/6 × 7 = 105/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
72/21 = 72 × 2/21 × 2 = 144/42 - Subtract the two like fractions:
105/42 - 144/42 = 105 - 144/42 = -39/42 - After reducing the fraction, the answer is -13/14
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