Subtract 80/5 from 90/8
1st number: 11 2/8, 2nd number: 16 0/5
90/8 - 80/5 is -19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
80/5 = 80 × 8/5 × 8 = 640/40 - Subtract the two like fractions:
450/40 - 640/40 = 450 - 640/40 = -190/40 - After reducing the fraction, the answer is -19/4
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