Subtract 80/70 from 35/40
1st number: 35/40, 2nd number: 1 10/70
35/40 - 80/70 is -15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
35/40 = 35 × 7/40 × 7 = 245/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
80/70 = 80 × 4/70 × 4 = 320/280 - Subtract the two like fractions:
245/280 - 320/280 = 245 - 320/280 = -75/280 - After reducing the fraction, the answer is -15/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-80/70 35/80-80/70