First change both fractions so that they have a common denominator. The least common factor of 25 and 20 is 100. That means 100 is going to be the denominator.
[tex] 2 \frac{16 \times 4}{25 \times 4} = 2 \frac{64}{100} [/tex]
[tex] 3 \frac{18 \times 5}{20 \times 5} = 3 \frac{90}{100} [/tex]
Now add the 2 mixed numbers:
[tex] 2 \frac{64}{100} + 3 \frac{90}{100} = 5 \frac{154}{100} \rightarrow 6 \frac{54}{100} \rightarrow 6 \frac{27}{50} [/tex]
Your answer is [tex] 6 \frac{27}{50} [/tex]
