Subtract 81/36 from 35/20
1st number: 1 15/20, 2nd number: 2 9/36
35/20 - 81/36 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
35/20 = 35 × 9/20 × 9 = 315/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
81/36 = 81 × 5/36 × 5 = 405/180 - Subtract the two like fractions:
315/180 - 405/180 = 315 - 405/180 = -90/180 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-81/36 35/40-81/36 35/20-81/72 35/60-81/36