Subtract 9/70 from 5/42
5/42 - 9/70 is -1/105.
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,
5/42 = 5 × 5/42 × 5 = 25/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
9/70 = 9 × 3/70 × 3 = 27/210 - Subtract the two like fractions:
25/210 - 27/210 = 25 - 27/210 = -2/210 - After reducing the fraction, the answer is -1/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42-9/70 5/42-18/70 5/84-9/70 15/42-9/70 5/42-27/70 25/42-9/70 5/42-45/70 35/42-9/70 5/42-63/70