Subtract 35/40 from 15/70
15/70 - 35/40 is -37/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
15/70 = 15 × 4/70 × 4 = 60/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
35/40 = 35 × 7/40 × 7 = 245/280 - Subtract the two like fractions:
60/280 - 245/280 = 60 - 245/280 = -185/280 - After reducing the fraction, the answer is -37/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70-35/40 15/70-70/40 15/70-35/80 45/70-35/40 75/70-35/40