Subtract 70/10 from 28/80
1st number: 28/80, 2nd number: 7 0/10
28/80 - 70/10 is -133/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
28/80 = 28 × 1/80 × 1 = 28/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
70/10 = 70 × 8/10 × 8 = 560/80 - Subtract the two like fractions:
28/80 - 560/80 = 28 - 560/80 = -532/80 - After reducing the fraction, the answer is -133/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/80-70/10 28/80-70/20 84/80-70/10 28/80-70/30 28/80-70/50