Subtract 30/7 from 72/28
1st number: 2 16/28, 2nd number: 4 2/7
72/28 - 30/7 is -12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
72/28 = 72 × 1/28 × 1 = 72/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
30/7 = 30 × 4/7 × 4 = 120/28 - Subtract the two like fractions:
72/28 - 120/28 = 72 - 120/28 = -48/28 - After reducing the fraction, the answer is -12/7
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