Add 28/84 and 81/45
1st number: 28/84, 2nd number: 1 36/45
28/84 + 81/45 is 32/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
28/84 = 28 × 15/84 × 15 = 420/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
81/45 = 81 × 28/45 × 28 = 2268/1260 - Add the two like fractions:
420/1260 + 2268/1260 = 420 + 2268/1260 = 2688/1260 - 2688/1260 simplified gives 32/15
- So, 28/84 + 81/45 = 32/15
In mixed form: 22/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+81/45 28/84+81/90