Add 45/21 and 20/84
1st number: 2 3/21, 2nd number: 20/84
45/21 + 20/84 is 50/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Add the two like fractions:
180/84 + 20/84 = 180 + 20/84 = 200/84 - 200/84 simplified gives 50/21
- So, 45/21 + 20/84 = 50/21
In mixed form: 28/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+20/84 45/21+40/84 45/42+20/84 45/21+60/84 45/63+20/84