For a certain rectangular photo, the ratio of its length to its width is 3 to 4. If the width of the photo is increased by 50%, by what percentage would the area of the photo increase and still maintain the ratio?
Answer:
B
Explanation
The correct answer is Choice B.
Let $l=$length and $w=$width of the photo.
Choice A is incorrect because this is the factor by which each side lengths increased.
Choice C is incorrect and may result from algebraic mistakes.
Choice D is incorrect because this is the factor by which the area increased, not by how much it increased.
✨ Expert's Tip ✨
If something doubled, that is 200% of the original value or 100% increase of the original value.