Subtract 90/28 from 70/30
1st number: 2 10/30, 2nd number: 3 6/28
70/30 - 90/28 is -37/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
70/30 = 70 × 14/30 × 14 = 980/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
90/28 = 90 × 15/28 × 15 = 1350/420 - Subtract the two like fractions:
980/420 - 1350/420 = 980 - 1350/420 = -370/420 - After reducing the fraction, the answer is -37/42
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