Subtract 2/20 from 7/72
7/72 - 2/20 is -1/360.
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,
7/72 = 7 × 5/72 × 5 = 35/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
2/20 = 2 × 18/20 × 18 = 36/360 - Subtract the two like fractions:
35/360 - 36/360 = 35 - 36/360 = -1/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-2/20 7/72-4/20 7/72-2/40 21/72-2/20 7/72-6/20 7/72-2/60 35/72-2/20 7/72-10/20 49/72-2/20 7/72-14/20