Add 90/25 and 84/81
1st number: 3 15/25, 2nd number: 1 3/81
90/25 + 84/81 is 626/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 25 × 81 = 2025,
90/25 = 90 × 81/25 × 81 = 7290/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
84/81 = 84 × 25/81 × 25 = 2100/2025 - Add the two like fractions:
7290/2025 + 2100/2025 = 7290 + 2100/2025 = 9390/2025 - 9390/2025 simplified gives 626/135
- So, 90/25 + 84/81 = 626/135
In mixed form: 486/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50+84/81 90/75+84/81