Subtract 6/20 from 70/72
70/72 - 6/20 is 121/180.
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,
70/72 = 70 × 5/72 × 5 = 350/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
6/20 = 6 × 18/20 × 18 = 108/360 - Subtract the two like fractions:
350/360 - 108/360 = 350 - 108/360 = 242/360 - After reducing the fraction, the answer is 121/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72-12/20 70/72-6/40 70/72-18/20 70/72-6/60 70/72-30/20 70/72-42/20