Subtract 5/18 from 70/20
1st number: 3 10/20, 2nd number: 5/18
70/20 - 5/18 is 29/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
5/18 = 5 × 10/18 × 10 = 50/180 - Subtract the two like fractions:
630/180 - 50/180 = 630 - 50/180 = 580/180 - After reducing the fraction, the answer is 29/9
- In mixed form: 32/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-10/18 70/40-5/18 70/20-5/36 70/20-15/18 70/60-5/18 70/20-5/54 70/20-25/18 70/20-5/90 70/20-35/18