Add 30/80 and 21/27
30/80 + 21/27 is 83/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 27 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 80 × 27 = 2160,
30/80 = 30 × 27/80 × 27 = 810/2160 - Likewise, for the 2nd fraction, since 27 × 80 = 2160,
21/27 = 21 × 80/27 × 80 = 1680/2160 - Add the two like fractions:
810/2160 + 1680/2160 = 810 + 1680/2160 = 2490/2160 - 2490/2160 simplified gives 83/72
- So, 30/80 + 21/27 = 83/72
In mixed form: 111/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+21/27 30/80+42/27 30/80+21/54 90/80+21/27 30/80+63/27 30/80+21/81