Subtract 40/9 from 45/7
1st number: 6 3/7, 2nd number: 4 4/9
45/7 - 40/9 is 125/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
45/7 = 45 × 9/7 × 9 = 405/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
40/9 = 40 × 7/9 × 7 = 280/63 - Subtract the two like fractions:
405/63 - 280/63 = 405 - 280/63 = 125/63 - In mixed form: 162/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-40/9 45/7-80/9 45/14-40/9 45/7-40/18 45/21-40/9 45/7-40/27 45/35-40/9 45/7-40/45 45/49-40/9 45/7-40/63