Add 27/36 and 21/40
27/36 + 21/40 is 51/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
27/36 = 27 × 10/36 × 10 = 270/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
270/360 + 189/360 = 270 + 189/360 = 459/360 - 459/360 simplified gives 51/40
- So, 27/36 + 21/40 = 51/40
In mixed form: 111/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/36+21/40 27/36+42/40 27/72+21/40 27/36+21/80 81/36+21/40 27/36+63/40