Subtract 70/80 from 80/4
1st number: 20 0/4, 2nd number: 70/80
80/4 - 70/80 is 153/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
80/4 = 80 × 20/4 × 20 = 1600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
70/80 = 70 × 1/80 × 1 = 70/80 - Subtract the two like fractions:
1600/80 - 70/80 = 1600 - 70/80 = 1530/80 - After reducing the fraction, the answer is 153/8
- In mixed form: 191/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8-70/80 80/12-70/80 80/20-70/80 80/28-70/80