Subtract 9/7 from 40/60
1st number: 40/60, 2nd number: 1 2/7
40/60 - 9/7 is -13/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
40/60 = 40 × 7/60 × 7 = 280/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
9/7 = 9 × 60/7 × 60 = 540/420 - Subtract the two like fractions:
280/420 - 540/420 = 280 - 540/420 = -260/420 - After reducing the fraction, the answer is -13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/60-9/7 40/60-18/7 40/60-9/14 40/60-27/7 40/60-9/21 40/60-45/7 40/60-9/35 40/60-63/7 40/60-9/49