Subtract 70/20 from 18/5
1st number: 3 3/5, 2nd number: 3 10/20
18/5 - 70/20 is 1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
70/20 = 70 × 1/20 × 1 = 70/20 - Subtract the two like fractions:
72/20 - 70/20 = 72 - 70/20 = 2/20 - After reducing the fraction, the answer is 1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-70/20 18/10-70/20 18/5-70/40 54/5-70/20 18/15-70/20 18/5-70/60 90/5-70/20 18/25-70/20 18/35-70/20