Add 84/45 and 72/15
1st number: 1 39/45, 2nd number: 4 12/15
84/45 + 72/15 is 20/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
84/45 = 84 × 1/45 × 1 = 84/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
72/15 = 72 × 3/15 × 3 = 216/45 - Add the two like fractions:
84/45 + 216/45 = 84 + 216/45 = 300/45 - 300/45 simplified gives 20/3
- So, 84/45 + 72/15 = 20/3
In mixed form: 62/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+72/15 84/45+72/30 84/45+72/45 84/45+72/75