Subtract 20/8 from 36/84
1st number: 36/84, 2nd number: 2 4/8
36/84 - 20/8 is -29/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
36/84 = 36 × 2/84 × 2 = 72/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Subtract the two like fractions:
72/168 - 420/168 = 72 - 420/168 = -348/168 - After reducing the fraction, the answer is -29/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84-20/8 36/84-40/8 36/84-20/16 36/84-60/8 36/84-20/24 36/84-20/40 36/84-20/56