Add 81/12 and 42/25
1st number: 6 9/12, 2nd number: 1 17/25
81/12 + 42/25 is 843/100.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
81/12 = 81 × 25/12 × 25 = 2025/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
42/25 = 42 × 12/25 × 12 = 504/300 - Add the two like fractions:
2025/300 + 504/300 = 2025 + 504/300 = 2529/300 - 2529/300 simplified gives 843/100
- So, 81/12 + 42/25 = 843/100
In mixed form: 843/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+84/25 81/24+42/25 81/12+42/50 81/36+42/25 81/12+42/75 81/60+42/25 81/84+42/25