Add 10/81 and 90/84
1st number: 10/81, 2nd number: 1 6/84
10/81 + 90/84 is 1355/1134.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 84 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
10/81 = 10 × 28/81 × 28 = 280/2268 - Likewise, for the 2nd fraction, since 84 × 27 = 2268,
90/84 = 90 × 27/84 × 27 = 2430/2268 - Add the two like fractions:
280/2268 + 2430/2268 = 280 + 2430/2268 = 2710/2268 - 2710/2268 simplified gives 1355/1134
- So, 10/81 + 90/84 = 1355/1134
In mixed form: 1221/1134
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/81+90/84 30/81+90/84 50/81+90/84 70/81+90/84