Answer: 25% decrease
Step-by-step explanation:
We know that 28 dollars a share was at its 100 percent. So we can make the fraction 28/100. Equal this to 21/x.
so we have: 28/100 = 21/x
Now just cross-multiply and simplify.
And you get what x is.
You get x = 75. So to see how much it went down, we subtract 75 from 100.
