Add 3/84 and 20/90
3/84 + 20/90 is 65/252.
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,
3/84 = 3 × 15/84 × 15 = 45/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
20/90 = 20 × 14/90 × 14 = 280/1260 - Add the two like fractions:
45/1260 + 280/1260 = 45 + 280/1260 = 325/1260 - 325/1260 simplified gives 65/252
- So, 3/84 + 20/90 = 65/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84+20/90 3/84+40/90 9/84+20/90 3/84+60/90 15/84+20/90 21/84+20/90