The stock market report says that 4 stocks went up for every 5 stocks that went down. If 635 stocks went down yesterday, how many went up? Set up and solve a proportion for the problem.
Let's set up a proportion to solve the problem:
up / down = 4 / 5
Since we know that 635 stocks went down, we can substitute that into the equation:
up / 635 = 4 / 5
To solve for "up," we cross-multiply:
5 * up = 635 * 4
Simplifying:
5up = 2540
Finally, divide both sides by 5 to solve for "up":
up = 2540 / 5 = 508
Therefore, 508 stocks went up.