Subtract 72/30 from 40/28
1st number: 1 12/28, 2nd number: 2 12/30
40/28 - 72/30 is -34/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
40/28 = 40 × 15/28 × 15 = 600/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
72/30 = 72 × 14/30 × 14 = 1008/420 - Subtract the two like fractions:
600/420 - 1008/420 = 600 - 1008/420 = -408/420 - After reducing the fraction, the answer is -34/35
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