Add 20/84 and 50/90
20/84 + 50/90 is 50/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
20/84 = 20 × 15/84 × 15 = 300/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
50/90 = 50 × 14/90 × 14 = 700/1260 - Add the two like fractions:
300/1260 + 700/1260 = 300 + 700/1260 = 1000/1260 - 1000/1260 simplified gives 50/63
- So, 20/84 + 50/90 = 50/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+50/90 60/84+50/90