Add 15/25 and 84/81
1st number: 15/25, 2nd number: 1 3/81
15/25 + 84/81 is 221/135.
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,
15/25 = 15 × 81/25 × 81 = 1215/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
84/81 = 84 × 25/81 × 25 = 2100/2025 - Add the two like fractions:
1215/2025 + 2100/2025 = 1215 + 2100/2025 = 3315/2025 - 3315/2025 simplified gives 221/135
- So, 15/25 + 84/81 = 221/135
In mixed form: 186/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25+84/81 15/50+84/81 45/25+84/81 15/75+84/81 75/25+84/81