Complete the following table: Common fraction: 3/4, Decimal fraction: 0.75, Percentage. Calculate and round off to 2 decimal places: 4.765+6.114-3.520; 2.403 ÷ 9

Add the first two numbers:

$$4.765 + 6.114 = 10.879$$

Subtract the third number from the sum:

$$10.879 - 3.520 = 7.359$$

The third decimal place is 9, which is 5 or greater, so round up the second decimal place.

$$7.359 \approx 7.36$$

The final answer for 2.5.1 is $\boxed{7.36}$.

Question 2.5.2

Divide 2.403 by 9:

$$2.403 \div 9 = 0.267$$

The third decimal place is 7, which is 5 or greater, so round up the second decimal place.

$$0.267 \approx 0.27$$

The final answer for 2.5.2 is $\boxed{0.27}$.