Subtract 21/90 from 84/15
1st number: 5 9/15, 2nd number: 21/90
84/15 - 21/90 is 161/30.
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,
84/15 = 84 × 6/15 × 6 = 504/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
504/90 - 21/90 = 504 - 21/90 = 483/90 - After reducing the fraction, the answer is 161/30
- In mixed form: 511/30
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