Subtract 20/7 from 63/18
1st number: 3 9/18, 2nd number: 2 6/7
63/18 - 20/7 is 9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
63/18 = 63 × 7/18 × 7 = 441/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
20/7 = 20 × 18/7 × 18 = 360/126 - Subtract the two like fractions:
441/126 - 360/126 = 441 - 360/126 = 81/126 - After reducing the fraction, the answer is 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/18-40/7 63/36-20/7 63/18-20/14 63/18-60/7 63/54-20/7 63/18-20/21 63/90-20/7 63/18-20/35 63/18-20/49