Sales at terri's tackle went up 1.4% in june, down 4.87% in july, up 3% in august, and down 1.33% in september. did terry's sales rise or fall over those four months? by how much?

To find how much it went up/down by, you do an equation. In June, it went up by 1.4%. That's a positive number. Down by 4.87 in July (negative), up 3% in August (positive), and down 1.33% in September (negative).
So the equation would be, 1.4-4.87+3-1.33
That gives you the answer of -1.8.

In conclusion, it fell over the four months, by -1.8%.

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