Add 18/81 and 90/25
1st number: 18/81, 2nd number: 3 15/25
18/81 + 90/25 is 172/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 25 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 81 × 25 = 2025,
18/81 = 18 × 25/81 × 25 = 450/2025 - Likewise, for the 2nd fraction, since 25 × 81 = 2025,
90/25 = 90 × 81/25 × 81 = 7290/2025 - Add the two like fractions:
450/2025 + 7290/2025 = 450 + 7290/2025 = 7740/2025 - 7740/2025 simplified gives 172/45
- So, 18/81 + 90/25 = 172/45
In mixed form: 337/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+90/25 18/81+90/50 54/81+90/25 18/81+90/75 90/81+90/25