Add 20/25 and 12/81
20/25 + 12/81 is 128/135.
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,
20/25 = 20 × 81/25 × 81 = 1620/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
12/81 = 12 × 25/81 × 25 = 300/2025 - Add the two like fractions:
1620/2025 + 300/2025 = 1620 + 300/2025 = 1920/2025 - 1920/2025 simplified gives 128/135
- So, 20/25 + 12/81 = 128/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25+12/81 20/25+24/81 20/50+12/81 60/25+12/81 20/25+36/81 20/75+12/81 20/25+60/81 20/25+84/81