Add 81/30 and 27/90
1st number: 2 21/30, 2nd number: 27/90
81/30 + 27/90 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
27/90 = 27 × 1/90 × 1 = 27/90 - Add the two like fractions:
243/90 + 27/90 = 243 + 27/90 = 270/90 - 270/90 simplified gives 3/1
- So, 81/30 + 27/90 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+54/90 81/60+27/90 81/30+81/90 81/90+27/90