Subtract 90/63 from 2/7
1st number: 2/7, 2nd number: 1 27/63
2/7 - 90/63 is -8/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
2/7 = 2 × 9/7 × 9 = 18/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
90/63 = 90 × 1/63 × 1 = 90/63 - Subtract the two like fractions:
18/63 - 90/63 = 18 - 90/63 = -72/63 - After reducing the fraction, the answer is -8/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7-90/63 2/14-90/63 6/7-90/63 2/21-90/63 10/7-90/63 2/35-90/63 14/7-90/63 2/49-90/63