Add 30/25 and 7/81
1st number: 1 5/25, 2nd number: 7/81
30/25 + 7/81 is 521/405.
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,
30/25 = 30 × 81/25 × 81 = 2430/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
7/81 = 7 × 25/81 × 25 = 175/2025 - Add the two like fractions:
2430/2025 + 175/2025 = 2430 + 175/2025 = 2605/2025 - 2605/2025 simplified gives 521/405
- So, 30/25 + 7/81 = 521/405
In mixed form: 1116/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/25+7/81 30/25+14/81 30/50+7/81 90/25+7/81 30/25+21/81 30/75+7/81 30/25+35/81 30/25+49/81