Subtract 21/6 from 72/42
1st number: 1 30/42, 2nd number: 3 3/6
72/42 - 21/6 is -25/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
72/42 = 72 × 1/42 × 1 = 72/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Subtract the two like fractions:
72/42 - 147/42 = 72 - 147/42 = -75/42 - After reducing the fraction, the answer is -25/14
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