Final answer:
To calculate the final value of 360 after a 25% increase and a 50% decrease, you multiply 360 by 1.25 to increase it, and then multiply the result by 0.5 to decrease it, which gives a final answer of 225.
Step-by-step explanation:
The student has a question regarding percentage increase and decrease applied to the number 360. To find the new value after an increase of 25 percent, multiply 360 by 1.25. The calculation is 360 × 1.25 = 450. Next, the number 450 is to be decreased by 50 percent. To find the result of a 50 percent decrease, multiply 450 by 0.5. The calculation is 450 × 0.5 = 225.
Therefore, after increasing 360 by 25 percent and then decreasing it by 50 percent, the final answer is 225.