Subtract 9/20 from 6/72
6/72 - 9/20 is -11/30.
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,
6/72 = 6 × 5/72 × 5 = 30/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
9/20 = 9 × 18/20 × 18 = 162/360 - Subtract the two like fractions:
30/360 - 162/360 = 30 - 162/360 = -132/360 - After reducing the fraction, the answer is -11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/72-9/20 6/72-18/20 6/72-9/40 18/72-9/20 6/72-27/20 6/72-9/60 30/72-9/20 6/72-45/20 42/72-9/20 6/72-63/20