Subtract 90/16 from 72/15
1st number: 4 12/15, 2nd number: 5 10/16
72/15 - 90/16 is -33/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
72/15 = 72 × 16/15 × 16 = 1152/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
90/16 = 90 × 15/16 × 15 = 1350/240 - Subtract the two like fractions:
1152/240 - 1350/240 = 1152 - 1350/240 = -198/240 - After reducing the fraction, the answer is -33/40
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