You could say 2 1/4 = 3/8p
2 1/4 is the total height of the stack, which is equal to 3/8 (thickness of each piece of paper) multiplied by p (placeholder for the total pieces of paper).
By solving for p, we are solving for the number of pieces of paper that will give us a stacked height of 2 1/4 inches.
We can solve this equation by dividing both sides by 3/8, giving us p = 6
Hope this helps!
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