Add 40/30 and 21/27
1st number: 1 10/30, 2nd number: 21/27
40/30 + 21/27 is 19/9.
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,
40/30 = 40 × 9/30 × 9 = 360/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Add the two like fractions:
360/270 + 210/270 = 360 + 210/270 = 570/270 - 570/270 simplified gives 19/9
- So, 40/30 + 21/27 = 19/9
In mixed form: 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30+21/27 40/30+42/27 40/60+21/27 40/30+21/54 40/30+63/27 40/90+21/27 40/30+21/81