Add 45/20 and 16/81
1st number: 2 5/20, 2nd number: 16/81
45/20 + 16/81 is 793/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
45/20 = 45 × 81/20 × 81 = 3645/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
16/81 = 16 × 20/81 × 20 = 320/1620 - Add the two like fractions:
3645/1620 + 320/1620 = 3645 + 320/1620 = 3965/1620 - 3965/1620 simplified gives 793/324
- So, 45/20 + 16/81 = 793/324
In mixed form: 2145/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+16/81 45/20+32/81 45/40+16/81 45/20+48/81 45/60+16/81 45/20+80/81