Subtract 9/84 from 3/70
3/70 - 9/84 is -9/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
3/70 = 3 × 6/70 × 6 = 18/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
9/84 = 9 × 5/84 × 5 = 45/420 - Subtract the two like fractions:
18/420 - 45/420 = 18 - 45/420 = -27/420 - After reducing the fraction, the answer is -9/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/70-9/84 3/70-18/84 9/70-9/84 3/70-27/84 15/70-9/84 3/70-45/84 21/70-9/84 3/70-63/84