Subtract 70/5 from 70/20
1st number: 3 10/20, 2nd number: 14 0/5
70/20 - 70/5 is -21/2.
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,
70/5 = 70 × 4/5 × 4 = 280/20 - Subtract the two like fractions:
70/20 - 280/20 = 70 - 280/20 = -210/20 - After reducing the fraction, the answer is -21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-70/5 70/20-70/10 70/60-70/5 70/20-70/15 70/20-70/25 70/20-70/35