Subtract 72/28 from 70/42
1st number: 1 28/42, 2nd number: 2 16/28
70/42 - 72/28 is -19/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
70/42 = 70 × 2/42 × 2 = 140/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84 - Subtract the two like fractions:
140/84 - 216/84 = 140 - 216/84 = -76/84 - After reducing the fraction, the answer is -19/21
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