Subtract 15/27 from 90/7
1st number: 12 6/7, 2nd number: 15/27
90/7 - 15/27 is 775/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 7 × 27 = 189,
90/7 = 90 × 27/7 × 27 = 2430/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
15/27 = 15 × 7/27 × 7 = 105/189 - Subtract the two like fractions:
2430/189 - 105/189 = 2430 - 105/189 = 2325/189 - After reducing the fraction, the answer is 775/63
- In mixed form: 1219/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-30/27 90/14-15/27 90/7-15/54 90/7-45/27 90/21-15/27 90/7-15/81 90/7-75/27 90/35-15/27 90/49-15/27