Add 54/81 and 90/75
1st number: 54/81, 2nd number: 1 15/75
54/81 + 90/75 is 28/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 75 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 81 × 25 = 2025,
54/81 = 54 × 25/81 × 25 = 1350/2025 - Likewise, for the 2nd fraction, since 75 × 27 = 2025,
90/75 = 90 × 27/75 × 27 = 2430/2025 - Add the two like fractions:
1350/2025 + 2430/2025 = 1350 + 2430/2025 = 3780/2025 - 3780/2025 simplified gives 28/15
- So, 54/81 + 90/75 = 28/15
In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: