Subtract 40/9 from 70/84
1st number: 70/84, 2nd number: 4 4/9
70/84 - 40/9 is -65/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
70/84 = 70 × 3/84 × 3 = 210/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
40/9 = 40 × 28/9 × 28 = 1120/252 - Subtract the two like fractions:
210/252 - 1120/252 = 210 - 1120/252 = -910/252 - After reducing the fraction, the answer is -65/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84-80/9 70/84-40/18 70/84-40/27 70/84-40/45 70/84-40/63