Subtract 90/7 from 4/6
1st number: 4/6, 2nd number: 12 6/7
4/6 - 90/7 is -256/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
4/6 = 4 × 7/6 × 7 = 28/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
90/7 = 90 × 6/7 × 6 = 540/42 - Subtract the two like fractions:
28/42 - 540/42 = 28 - 540/42 = -512/42 - After reducing the fraction, the answer is -256/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/6-90/7 4/12-90/7 4/6-90/14 12/6-90/7 4/18-90/7 4/6-90/21 20/6-90/7 4/30-90/7 4/6-90/35 28/6-90/7 4/42-90/7 4/6-90/49