exam Maths Puzzle Numerical Ability

Margin of Profit is the net income divided by total sales.

A company's margin of profit increased by .02 from last year.
Last year the company sold its product at $3.00 each a

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exam Other Question
what is 20 percent of 100 PROBLEM:
SOLVE THE EQUATION WITH ANY METHOD YOU PREFER. (QUADRATIC, "U" SUBSTITUTION...)
9(x+3/2)^2-6(x+3/2)+1=0
FROM HERE I THINK I WOULD PREFER USING THE "U" METHOD
U=(x+3/2)