Subtract 40/63 from 18/7
1st number: 2 4/7, 2nd number: 40/63
18/7 - 40/63 is 122/63.
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,
18/7 = 18 × 9/7 × 9 = 162/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
40/63 = 40 × 1/63 × 1 = 40/63 - Subtract the two like fractions:
162/63 - 40/63 = 162 - 40/63 = 122/63 - In mixed form: 159/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7-40/63 18/7-80/63 18/14-40/63 54/7-40/63 18/21-40/63 90/7-40/63 18/35-40/63 18/49-40/63