Subtract 8/10 from 40/72
40/72 - 8/10 is -11/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
40/72 = 40 × 5/72 × 5 = 200/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
8/10 = 8 × 36/10 × 36 = 288/360 - Subtract the two like fractions:
200/360 - 288/360 = 200 - 288/360 = -88/360 - After reducing the fraction, the answer is -11/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/72-8/10 40/72-16/10 40/72-8/20 40/72-24/10 40/72-8/30 40/72-40/10 40/72-8/50 40/72-56/10 40/72-8/70