Add 84/63 and 28/20
1st number: 1 21/63, 2nd number: 1 8/20
84/63 + 28/20 is 41/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
84/63 = 84 × 20/63 × 20 = 1680/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
28/20 = 28 × 63/20 × 63 = 1764/1260 - Add the two like fractions:
1680/1260 + 1764/1260 = 1680 + 1764/1260 = 3444/1260 - 3444/1260 simplified gives 41/15
- So, 84/63 + 28/20 = 41/15
In mixed form: 211/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+56/20 84/63+28/40 84/63+84/20 84/63+28/60