Add 81/30 and 15/27
1st number: 2 21/30, 2nd number: 15/27
81/30 + 15/27 is 293/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
81/30 = 81 × 9/30 × 9 = 729/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
15/27 = 15 × 10/27 × 10 = 150/270 - Add the two like fractions:
729/270 + 150/270 = 729 + 150/270 = 879/270 - 879/270 simplified gives 293/90
- So, 81/30 + 15/27 = 293/90
In mixed form: 323/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+30/27 81/60+15/27 81/30+15/54 81/30+45/27 81/90+15/27 81/30+15/81 81/30+75/27