Subtract 72/5 from 90/8
1st number: 11 2/8, 2nd number: 14 2/5
90/8 - 72/5 is -63/20.
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,
72/5 = 72 × 8/5 × 8 = 576/40 - Subtract the two like fractions:
450/40 - 576/40 = 450 - 576/40 = -126/40 - After reducing the fraction, the answer is -63/20
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