Subtract 90/15 from 81/4
1st number: 20 1/4, 2nd number: 6 0/15
81/4 - 90/15 is 57/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
81/4 = 81 × 15/4 × 15 = 1215/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Subtract the two like fractions:
1215/60 - 360/60 = 1215 - 360/60 = 855/60 - After reducing the fraction, the answer is 57/4
- In mixed form: 141/4
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