Subtract 30/72 from 20/10
1st number: 2 0/10, 2nd number: 30/72
20/10 - 30/72 is 19/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 10 × 36 = 360,
20/10 = 20 × 36/10 × 36 = 720/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
30/72 = 30 × 5/72 × 5 = 150/360 - Subtract the two like fractions:
720/360 - 150/360 = 720 - 150/360 = 570/360 - After reducing the fraction, the answer is 19/12
- In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10-30/72 20/10-60/72 60/10-30/72 20/10-90/72 20/30-30/72 20/50-30/72 20/70-30/72