Subtract 3/5 from 20/72
20/72 - 3/5 is -29/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
20/72 = 20 × 5/72 × 5 = 100/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
3/5 = 3 × 72/5 × 72 = 216/360 - Subtract the two like fractions:
100/360 - 216/360 = 100 - 216/360 = -116/360 - After reducing the fraction, the answer is -29/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72-3/5 20/72-6/5 20/72-3/10 60/72-3/5 20/72-9/5 20/72-3/15 20/72-15/5 20/72-3/25 20/72-21/5 20/72-3/35