Subtract 9/21 from 63/80
63/80 - 9/21 is 201/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
63/80 = 63 × 21/80 × 21 = 1323/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
9/21 = 9 × 80/21 × 80 = 720/1680 - Subtract the two like fractions:
1323/1680 - 720/1680 = 1323 - 720/1680 = 603/1680 - After reducing the fraction, the answer is 201/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/80-18/21 63/80-9/42 63/80-27/21 63/80-9/63 63/80-45/21 63/80-63/21