Add 90/25 and 4/81
1st number: 3 15/25, 2nd number: 4/81
90/25 + 4/81 is 1478/405.
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,
90/25 = 90 × 81/25 × 81 = 7290/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
4/81 = 4 × 25/81 × 25 = 100/2025 - Add the two like fractions:
7290/2025 + 100/2025 = 7290 + 100/2025 = 7390/2025 - 7390/2025 simplified gives 1478/405
- So, 90/25 + 4/81 = 1478/405
In mixed form: 3263/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/25+8/81 90/50+4/81 90/25+12/81 90/75+4/81 90/25+20/81 90/25+28/81