Add 27/90 and 9/40
27/90 + 9/40 is 21/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
27/90 = 27 × 4/90 × 4 = 108/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Add the two like fractions:
108/360 + 81/360 = 108 + 81/360 = 189/360 - 189/360 simplified gives 21/40
- So, 27/90 + 9/40 = 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+9/40 27/90+18/40 27/90+9/80 81/90+9/40 27/90+27/40 27/90+45/40 27/90+63/40