Subtract 4/20 from 2/72
2/72 - 4/20 is -31/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
2/72 = 2 × 5/72 × 5 = 10/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
4/20 = 4 × 18/20 × 18 = 72/360 - Subtract the two like fractions:
10/360 - 72/360 = 10 - 72/360 = -62/360 - After reducing the fraction, the answer is -31/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/72-4/20 2/72-8/20 2/72-4/40 6/72-4/20 2/72-12/20 2/72-4/60 10/72-4/20 14/72-4/20 2/72-28/20