Answer :

To solve this problem step-by-step:

1. Determine the initial value: The initial value is given as 450.

2. Understand the percentage increase: We are to increase this initial value by 200%.

3. Calculate the increase in value:
- To determine the increase, convert the percentage to a decimal. This involves dividing the percentage by 100. For 200%, the decimal equivalent is [tex]\( \frac{200}{100} = 2 \)[/tex].
- Multiply the initial value by this decimal to find the increase: [tex]\( 450 \times 2 = 900 \)[/tex].

4. Calculate the new value:
- Add the calculated increase to the initial value to find the new value: [tex]\( 450 + 900 = 1350 \)[/tex].

So, the new value of 450 increased by 200% is 1350.

Therefore, the correct answer is:
(D) 1350