Subtract 70/27 from 90/7
1st number: 12 6/7, 2nd number: 2 16/27
90/7 - 70/27 is 1940/189.
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,
70/27 = 70 × 7/27 × 7 = 490/189 - Subtract the two like fractions:
2430/189 - 490/189 = 2430 - 490/189 = 1940/189 - In mixed form: 1050/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14-70/27 90/7-70/54 90/21-70/27 90/7-70/81 90/35-70/27 90/49-70/27