Subtract 70/18 from 90/28
1st number: 3 6/28, 2nd number: 3 16/18
90/28 - 70/18 is -85/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
90/28 = 90 × 9/28 × 9 = 810/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
70/18 = 70 × 14/18 × 14 = 980/252 - Subtract the two like fractions:
810/252 - 980/252 = 810 - 980/252 = -170/252 - After reducing the fraction, the answer is -85/126
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