Subtract 81/30 from 20/2
1st number: 10 0/2, 2nd number: 2 21/30
20/2 - 81/30 is 73/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
20/2 = 20 × 15/2 × 15 = 300/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
81/30 = 81 × 1/30 × 1 = 81/30 - Subtract the two like fractions:
300/30 - 81/30 = 300 - 81/30 = 219/30 - After reducing the fraction, the answer is 73/10
- In mixed form: 73/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/2-81/30 20/4-81/30 20/2-81/60 60/2-81/30 20/6-81/30 20/2-81/90 20/10-81/30 20/14-81/30