Subtract 72/10 from 30/20
1st number: 1 10/20, 2nd number: 7 2/10
30/20 - 72/10 is -57/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
72/10 = 72 × 2/10 × 2 = 144/20 - Subtract the two like fractions:
30/20 - 144/20 = 30 - 144/20 = -114/20 - After reducing the fraction, the answer is -57/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-72/10 30/40-72/10 30/20-72/20 90/20-72/10 30/60-72/10 30/20-72/30 30/20-72/50 30/20-72/70