Subtract 90/27 from 40/7
1st number: 5 5/7, 2nd number: 3 9/27
40/7 - 90/27 is 50/21.
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,
40/7 = 40 × 27/7 × 27 = 1080/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
90/27 = 90 × 7/27 × 7 = 630/189 - Subtract the two like fractions:
1080/189 - 630/189 = 1080 - 630/189 = 450/189 - After reducing the fraction, the answer is 50/21
- In mixed form: 28/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/7-90/27 40/14-90/27 40/7-90/54 40/21-90/27 40/7-90/81 40/35-90/27 40/49-90/27