Subtract 40/42 from 6/70
6/70 - 40/42 is -13/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
6/70 = 6 × 3/70 × 3 = 18/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Subtract the two like fractions:
18/210 - 200/210 = 18 - 200/210 = -182/210 - After reducing the fraction, the answer is -13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/70-40/42 6/70-80/42 6/70-40/84 18/70-40/42 30/70-40/42 42/70-40/42