Subtract 21/15 from 90/10
1st number: 9 0/10, 2nd number: 1 6/15
90/10 - 21/15 is 38/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
90/10 = 90 × 3/10 × 3 = 270/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Subtract the two like fractions:
270/30 - 42/30 = 270 - 42/30 = 228/30 - After reducing the fraction, the answer is 38/5
- In mixed form: 73/5
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