Add 2/84 and 21/90
2/84 + 21/90 is 9/35.
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,
2/84 = 2 × 15/84 × 15 = 30/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
21/90 = 21 × 14/90 × 14 = 294/1260 - Add the two like fractions:
30/1260 + 294/1260 = 30 + 294/1260 = 324/1260 - 324/1260 simplified gives 9/35
- So, 2/84 + 21/90 = 9/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/84+21/90 2/84+42/90 6/84+21/90 2/84+63/90 10/84+21/90 14/84+21/90