Subtract 10/72 from 3/20
3/20 - 10/72 is 1/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
3/20 = 3 × 18/20 × 18 = 54/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
10/72 = 10 × 5/72 × 5 = 50/360 - Subtract the two like fractions:
54/360 - 50/360 = 54 - 50/360 = 4/360 - After reducing the fraction, the answer is 1/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-10/72 3/20-20/72 3/40-10/72 9/20-10/72 3/20-30/72 3/60-10/72 15/20-10/72 3/20-50/72 21/20-10/72 3/20-70/72