Subtract 45/63 from 20/7
1st number: 2 6/7, 2nd number: 45/63
20/7 - 45/63 is 15/7.
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,
20/7 = 20 × 9/7 × 9 = 180/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
45/63 = 45 × 1/63 × 1 = 45/63 - Subtract the two like fractions:
180/63 - 45/63 = 180 - 45/63 = 135/63 - After reducing the fraction, the answer is 15/7
- In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-45/63 20/7-90/63 20/14-45/63 60/7-45/63 20/21-45/63 20/35-45/63 20/49-45/63