Add 81/90 and 90/27
1st number: 81/90, 2nd number: 3 9/27
81/90 + 90/27 is 127/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
81/90 = 81 × 3/90 × 3 = 243/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
90/27 = 90 × 10/27 × 10 = 900/270 - Add the two like fractions:
243/270 + 900/270 = 243 + 900/270 = 1143/270 - 1143/270 simplified gives 127/30
- So, 81/90 + 90/27 = 127/30
In mixed form: 47/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90+90/54 81/90+90/81