Subtract 90/28 from 18/70
1st number: 18/70, 2nd number: 3 6/28
18/70 - 90/28 is -207/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
18/70 = 18 × 2/70 × 2 = 36/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Subtract the two like fractions:
36/140 - 450/140 = 36 - 450/140 = -414/140 - After reducing the fraction, the answer is -207/70
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