Subtract 10/40 from 9/7
1st number: 1 2/7, 2nd number: 10/40
9/7 - 10/40 is 29/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
9/7 = 9 × 40/7 × 40 = 360/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
10/40 = 10 × 7/40 × 7 = 70/280 - Subtract the two like fractions:
360/280 - 70/280 = 360 - 70/280 = 290/280 - After reducing the fraction, the answer is 29/28
- In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-10/40 9/7-20/40 9/14-10/40 9/7-10/80 27/7-10/40 9/7-30/40 9/21-10/40 45/7-10/40 9/7-50/40 9/35-10/40 63/7-10/40 9/7-70/40 9/49-10/40