Subtract 40/7 from 90/28
1st number: 3 6/28, 2nd number: 5 5/7
90/28 - 40/7 is -5/2.
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,
90/28 = 90 × 1/28 × 1 = 90/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
40/7 = 40 × 4/7 × 4 = 160/28 - Subtract the two like fractions:
90/28 - 160/28 = 90 - 160/28 = -70/28 - After reducing the fraction, the answer is -5/2
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