Add 40/60 and 21/27
40/60 + 21/27 is 13/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 27 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 60 × 9 = 540,
40/60 = 40 × 9/60 × 9 = 360/540 - Likewise, for the 2nd fraction, since 27 × 20 = 540,
21/27 = 21 × 20/27 × 20 = 420/540 - Add the two like fractions:
360/540 + 420/540 = 360 + 420/540 = 780/540 - 780/540 simplified gives 13/9
- So, 40/60 + 21/27 = 13/9
In mixed form: 14/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/60+21/27 40/60+42/27 40/60+21/54 40/60+63/27 40/60+21/81