Subtract 20/9 from 75/7
1st number: 10 5/7, 2nd number: 2 2/9
75/7 - 20/9 is 535/63.
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,
75/7 = 75 × 9/7 × 9 = 675/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
20/9 = 20 × 7/9 × 7 = 140/63 - Subtract the two like fractions:
675/63 - 140/63 = 675 - 140/63 = 535/63 - In mixed form: 831/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/7-40/9 75/14-20/9 75/7-20/18 75/7-60/9 75/21-20/9 75/7-20/27 75/35-20/9 75/7-20/45 75/49-20/9 75/7-20/63