Subtract 9/84 from 20/8
1st number: 2 4/8, 2nd number: 9/84
20/8 - 9/84 is 67/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 84 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Likewise, for the 2nd fraction, since 84 × 2 = 168,
9/84 = 9 × 2/84 × 2 = 18/168 - Subtract the two like fractions:
420/168 - 18/168 = 420 - 18/168 = 402/168 - After reducing the fraction, the answer is 67/28
- In mixed form: 211/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-9/84 20/8-18/84 20/16-9/84 60/8-9/84 20/8-27/84 20/24-9/84 20/8-45/84 20/40-9/84 20/8-63/84 20/56-9/84