Subtract 63/21 from 20/24
1st number: 20/24, 2nd number: 3 0/21
20/24 - 63/21 is -13/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
20/24 = 20 × 7/24 × 7 = 140/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
63/21 = 63 × 8/21 × 8 = 504/168 - Subtract the two like fractions:
140/168 - 504/168 = 140 - 504/168 = -364/168 - After reducing the fraction, the answer is -13/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/24-63/21 20/48-63/21 20/24-63/42 60/24-63/21 20/72-63/21