Add 1/84 and 6/90
1/84 + 6/90 is 11/140.
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,
1/84 = 1 × 15/84 × 15 = 15/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
6/90 = 6 × 14/90 × 14 = 84/1260 - Add the two like fractions:
15/1260 + 84/1260 = 15 + 84/1260 = 99/1260 - 99/1260 simplified gives 11/140
- So, 1/84 + 6/90 = 11/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84+6/90 1/84+12/90 3/84+6/90 1/84+18/90 5/84+6/90 1/84+30/90 7/84+6/90 1/84+42/90