Add 72/45 and 81/30
1st number: 1 27/45, 2nd number: 2 21/30
72/45 + 81/30 is 43/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
72/45 = 72 × 2/45 × 2 = 144/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Add the two like fractions:
144/90 + 243/90 = 144 + 243/90 = 387/90 - 387/90 simplified gives 43/10
- So, 72/45 + 81/30 = 43/10
In mixed form: 43/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90+81/30 72/45+81/60 72/45+81/90