To calculate the amount of markup on each watch, we need to determine the cost price first. The markup rate is 150%, meaning the selling price is the cost price plus 150% of the cost price.

Let the cost price be $C$. Then:

$\text{Selling price} = C + 1.5C = 2.5C$

Given that the selling price is $435:

$2.5C = 435$

Now, solve for $C$:

$C = \frac{435}{2.5} = 174$

So, the cost price of each watch is $174.

Now, to find the amount of markup, subtract the cost price from the selling price:

$\text{Markup} = 435 - 174 = 261$

Thus, the amount of markup on each watch is $261.

Would you like further details or have any questions?

Here are five related questions for practice:

1. What is the cost price if the selling price is $500 with a 150% markup?
2. How would the markup change if the markup rate was reduced to 100%?
3. What is the selling price if the markup rate increases to 200%?
4. How do you calculate the markup percentage if the selling price and cost price are known?
5. If a watch costs $200 and the store applies a 150% markup, what will be the selling price?

Tip: Always express percentages as decimals (e.g., 150% as 1.5) when solving problems involving markup rates.