Add 5/30 and 21/27
5/30 + 21/27 is 17/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
5/30 = 5 × 9/30 × 9 = 45/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Add the two like fractions:
45/270 + 210/270 = 45 + 210/270 = 255/270 - 255/270 simplified gives 17/18
- So, 5/30 + 21/27 = 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/30+21/27 5/30+42/27 5/60+21/27 5/30+21/54 15/30+21/27 5/30+63/27 5/90+21/27 5/30+21/81 25/30+21/27 35/30+21/27