Subtract 42/90 from 72/15
1st number: 4 12/15, 2nd number: 42/90
72/15 - 42/90 is 13/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
72/15 = 72 × 6/15 × 6 = 432/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Subtract the two like fractions:
432/90 - 42/90 = 432 - 42/90 = 390/90 - After reducing the fraction, the answer is 13/3
- In mixed form: 41/3
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