Book Maths Puzzle Percentage

The price of fuel went from $1.90 to $2.25. What is the percentage of increase?

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Book Other Question

A rectangular courtyard is shown in the diagram below.** The shaded portion represents grass, and rectangles A and B are cement pads for picnic tables and chairs. The area of pad A Find the equation of the line that is parallel to y=3x-5 and passes through the point (-2, 7).

How do you go about finding a line that is parallel to another?
How do you go abo