Subtract 21/60 from 90/30
1st number: 3 0/30, 2nd number: 21/60
90/30 - 21/60 is 53/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
90/30 = 90 × 2/30 × 2 = 180/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Subtract the two like fractions:
180/60 - 21/60 = 180 - 21/60 = 159/60 - After reducing the fraction, the answer is 53/20
- In mixed form: 213/20
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