Add 81/36 and 40/25
1st number: 2 9/36, 2nd number: 1 15/25
81/36 + 40/25 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 25 is 900
Next, find the equivalent fraction of both fractional numbers with denominator 900 - For the 1st fraction, since 36 × 25 = 900,
81/36 = 81 × 25/36 × 25 = 2025/900 - Likewise, for the 2nd fraction, since 25 × 36 = 900,
40/25 = 40 × 36/25 × 36 = 1440/900 - Add the two like fractions:
2025/900 + 1440/900 = 2025 + 1440/900 = 3465/900 - 3465/900 simplified gives 77/20
- So, 81/36 + 40/25 = 77/20
In mixed form: 317/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/36+80/25 81/72+40/25 81/36+40/50 81/36+40/75