Add 27/30 and 21/27
27/30 + 21/27 is 151/90.
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,
27/30 = 27 × 9/30 × 9 = 243/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Add the two like fractions:
243/270 + 210/270 = 243 + 210/270 = 453/270 - 453/270 simplified gives 151/90
- So, 27/30 + 21/27 = 151/90
In mixed form: 161/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30+21/27 27/30+42/27 27/60+21/27 27/30+21/54 81/30+21/27 27/30+63/27 27/90+21/27 27/30+21/81