Subtract 7/70 from 10/40
10/40 - 7/70 is 3/20.
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,
10/40 = 10 × 7/40 × 7 = 70/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
7/70 = 7 × 4/70 × 4 = 28/280 - Subtract the two like fractions:
70/280 - 28/280 = 70 - 28/280 = 42/280 - After reducing the fraction, the answer is 3/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-7/70 10/40-14/70 10/80-7/70 30/40-7/70 10/40-21/70 50/40-7/70 10/40-35/70 70/40-7/70 10/40-49/70