Subtract 70/18 from 20/36
1st number: 20/36, 2nd number: 3 16/18
20/36 - 70/18 is -10/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 36 × 1 = 36,
20/36 = 20 × 1/36 × 1 = 20/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
70/18 = 70 × 2/18 × 2 = 140/36 - Subtract the two like fractions:
20/36 - 140/36 = 20 - 140/36 = -120/36 - After reducing the fraction, the answer is -10/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-70/18 20/72-70/18 20/36-70/36 60/36-70/18 20/36-70/54 20/36-70/90