Subtract 15/7 from 90/27
1st number: 3 9/27, 2nd number: 2 1/7
90/27 - 15/7 is 25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 7 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
90/27 = 90 × 7/27 × 7 = 630/189 - Likewise, for the 2nd fraction, since 7 × 27 = 189,
15/7 = 15 × 27/7 × 27 = 405/189 - Subtract the two like fractions:
630/189 - 405/189 = 630 - 405/189 = 225/189 - After reducing the fraction, the answer is 25/21
- In mixed form: 14/21
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