Subtract 90/8 from 28/70
1st number: 28/70, 2nd number: 11 2/8
28/70 - 90/8 is -217/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 8 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
28/70 = 28 × 4/70 × 4 = 112/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
90/8 = 90 × 35/8 × 35 = 3150/280 - Subtract the two like fractions:
112/280 - 3150/280 = 112 - 3150/280 = -3038/280 - After reducing the fraction, the answer is -217/20
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