Subtract 20/70 from 80/4
1st number: 20 0/4, 2nd number: 20/70
80/4 - 20/70 is 138/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
80/4 = 80 × 35/4 × 35 = 2800/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
20/70 = 20 × 2/70 × 2 = 40/140 - Subtract the two like fractions:
2800/140 - 40/140 = 2800 - 40/140 = 2760/140 - After reducing the fraction, the answer is 138/7
- In mixed form: 195/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-40/70 80/8-20/70 80/4-60/70 80/12-20/70 80/20-20/70 80/28-20/70