Add 21/28 and 45/3
1st number: 21/28, 2nd number: 15 0/3
21/28 + 45/3 is 63/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 3 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
21/28 = 21 × 3/28 × 3 = 63/84 - Likewise, for the 2nd fraction, since 3 × 28 = 84,
45/3 = 45 × 28/3 × 28 = 1260/84 - Add the two like fractions:
63/84 + 1260/84 = 63 + 1260/84 = 1323/84 - 1323/84 simplified gives 63/4
- So, 21/28 + 45/3 = 63/4
In mixed form: 153/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+45/3 21/28+90/3 21/56+45/3 21/28+45/6 63/28+45/3 21/84+45/3 21/28+45/9 21/28+45/15 21/28+45/21