Add 20/84 and 90/63
1st number: 20/84, 2nd number: 1 27/63
20/84 + 90/63 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
20/84 = 20 × 3/84 × 3 = 60/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
90/63 = 90 × 4/63 × 4 = 360/252 - Add the two like fractions:
60/252 + 360/252 = 60 + 360/252 = 420/252 - 420/252 simplified gives 5/3
- So, 20/84 + 90/63 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+90/63 60/84+90/63