Subtract 40/84 from 6/9
6/9 - 40/84 is 4/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
6/9 = 6 × 28/9 × 28 = 168/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
40/84 = 40 × 3/84 × 3 = 120/252 - Subtract the two like fractions:
168/252 - 120/252 = 168 - 120/252 = 48/252 - After reducing the fraction, the answer is 4/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/9-40/84 6/9-80/84 6/18-40/84 18/9-40/84 6/27-40/84 30/9-40/84 6/45-40/84 42/9-40/84 6/63-40/84