Question

on Monday, October 19th, 1987, the Dawn Jones Industrial Average dropped 508 points to 1,739 points at the end of the day. What was the percent change (to the nearest percent ) in this stock index on that day?

Answer 1

If it dropped 508 points to 1,739 points, it means the initial points were 2247.

To find the percent change, we just have to divide

$\frac{508}{2247}=0.226$

Then, we multiply by 100

$\text{0}.226\cdot100=22.6$

Hence, it dropped 22.6%.