Subtract 70/10 from 28/20
1st number: 1 8/20, 2nd number: 7 0/10
28/20 - 70/10 is -28/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
28/20 = 28 × 1/20 × 1 = 28/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
70/10 = 70 × 2/10 × 2 = 140/20 - Subtract the two like fractions:
28/20 - 140/20 = 28 - 140/20 = -112/20 - After reducing the fraction, the answer is -28/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-70/10 28/40-70/10 28/20-70/20 84/20-70/10 28/60-70/10 28/20-70/30 28/20-70/50