Subtract 90/16 from 70/20
1st number: 3 10/20, 2nd number: 5 10/16
70/20 - 90/16 is -17/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
70/20 = 70 × 4/20 × 4 = 280/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
90/16 = 90 × 5/16 × 5 = 450/80 - Subtract the two like fractions:
280/80 - 450/80 = 280 - 450/80 = -170/80 - After reducing the fraction, the answer is -17/8
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