Subtract 18/5 from 70/20
1st number: 3 10/20, 2nd number: 3 3/5
70/20 - 18/5 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
70/20 = 70 × 1/20 × 1 = 70/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Subtract the two like fractions:
70/20 - 72/20 = 70 - 72/20 = -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: 70/20-36/5 70/40-18/5 70/20-18/10 70/20-54/5 70/60-18/5 70/20-18/15 70/20-90/5 70/20-18/25 70/20-18/35