Subtract 84/9 from 70/49
1st number: 1 21/49, 2nd number: 9 3/9
70/49 - 84/9 is -166/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 9 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
70/49 = 70 × 9/49 × 9 = 630/441 - Likewise, for the 2nd fraction, since 9 × 49 = 441,
84/9 = 84 × 49/9 × 49 = 4116/441 - Subtract the two like fractions:
630/441 - 4116/441 = 630 - 4116/441 = -3486/441 - After reducing the fraction, the answer is -166/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/98-84/9 70/49-84/18 70/49-84/27 70/49-84/45 70/49-84/63