Add 45/3 and 21/84
1st number: 15 0/3, 2nd number: 21/84
45/3 + 21/84 is 61/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 3 × 28 = 84,
45/3 = 45 × 28/3 × 28 = 1260/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Add the two like fractions:
1260/84 + 21/84 = 1260 + 21/84 = 1281/84 - 1281/84 simplified gives 61/4
- So, 45/3 + 21/84 = 61/4
In mixed form: 151/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3+21/84 45/3+42/84 45/6+21/84 45/3+63/84 45/9+21/84 45/15+21/84 45/21+21/84