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Last year, sales at a book store increased from $5,000 to $10,000. This year, sales decreased to $5,000 from $10,000, what percentage did sales
Increase last year? What percentage did sales decrease this year?
Sales Increased last year, from $5,000 to $10,000. When sales dropped from $10,000 to $5,000 this year, sales decreased
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the answer is two. hope this !

answer: y=0 if that is what u r looking for

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.