Subtract 30/20 from 70/18
1st number: 3 16/18, 2nd number: 1 10/20
70/18 - 30/20 is 43/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
70/18 = 70 × 10/18 × 10 = 700/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Subtract the two like fractions:
700/180 - 270/180 = 700 - 270/180 = 430/180 - After reducing the fraction, the answer is 43/18
- In mixed form: 27/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18-60/20 70/36-30/20 70/18-30/40 70/18-90/20 70/54-30/20 70/18-30/60 70/90-30/20