Add 30/54 and 21/80
30/54 + 21/80 is 589/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 54 × 40 = 2160,
30/54 = 30 × 40/54 × 40 = 1200/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
21/80 = 21 × 27/80 × 27 = 567/2160 - Add the two like fractions:
1200/2160 + 567/2160 = 1200 + 567/2160 = 1767/2160 - 1767/2160 simplified gives 589/720
- So, 30/54 + 21/80 = 589/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/54+21/80 30/54+42/80 90/54+21/80 30/54+63/80