Subtract 75/72 from 7/40
1st number: 7/40, 2nd number: 1 3/72
7/40 - 75/72 is -13/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
7/40 = 7 × 9/40 × 9 = 63/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
75/72 = 75 × 5/72 × 5 = 375/360 - Subtract the two like fractions:
63/360 - 375/360 = 63 - 375/360 = -312/360 - After reducing the fraction, the answer is -13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-75/72 7/80-75/72 21/40-75/72 35/40-75/72 49/40-75/72