Subtract 3/20 from 70/72
70/72 - 3/20 is 37/45.
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,
3/20 = 3 × 18/20 × 18 = 54/360 - Subtract the two like fractions:
350/360 - 54/360 = 350 - 54/360 = 296/360 - After reducing the fraction, the answer is 37/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72-6/20 70/72-3/40 70/72-9/20 70/72-3/60 70/72-15/20 70/72-21/20