Subtract 10/70 from 10/42
10/42 - 10/70 is 2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
10/42 = 10 × 5/42 × 5 = 50/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
10/70 = 10 × 3/70 × 3 = 30/210 - Subtract the two like fractions:
50/210 - 30/210 = 50 - 30/210 = 20/210 - After reducing the fraction, the answer is 2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42-10/70 10/42-20/70 10/84-10/70 30/42-10/70 10/42-30/70 50/42-10/70 10/42-50/70 70/42-10/70