Add 9/20 and 21/54
9/20 + 21/54 is 151/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
9/20 = 9 × 27/20 × 27 = 243/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
21/54 = 21 × 10/54 × 10 = 210/540 - Add the two like fractions:
243/540 + 210/540 = 243 + 210/540 = 453/540 - 453/540 simplified gives 151/180
- So, 9/20 + 21/54 = 151/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20+21/54 9/20+42/54 9/40+21/54 27/20+21/54 9/20+63/54 9/60+21/54 45/20+21/54 63/20+21/54