Subtract 90/40 from 54/15
1st number: 3 9/15, 2nd number: 2 10/40
54/15 - 90/40 is 27/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
54/15 = 54 × 8/15 × 8 = 432/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Subtract the two like fractions:
432/120 - 270/120 = 432 - 270/120 = 162/120 - After reducing the fraction, the answer is 27/20
- In mixed form: 17/20
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