Subtract 80/12 from 75/70
1st number: 1 5/70, 2nd number: 6 8/12
75/70 - 80/12 is -235/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
75/70 = 75 × 6/70 × 6 = 450/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
80/12 = 80 × 35/12 × 35 = 2800/420 - Subtract the two like fractions:
450/420 - 2800/420 = 450 - 2800/420 = -2350/420 - After reducing the fraction, the answer is -235/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/70-80/24 75/70-80/36 75/70-80/60 75/70-80/84