Subtract 72/20 from 35/72
1st number: 35/72, 2nd number: 3 12/20
35/72 - 72/20 is -1121/360.
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,
35/72 = 35 × 5/72 × 5 = 175/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
72/20 = 72 × 18/20 × 18 = 1296/360 - Subtract the two like fractions:
175/360 - 1296/360 = 175 - 1296/360 = -1121/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72-72/20 35/72-72/40 35/72-72/60