Question

find percentage of increase or decrease
a) price of shirt decreased from rupees 282 to rupees 210
a) Marks in test increased from 20 to 30​

Answer 1

Answer:

a) 25.5% decrease

b) 50% increase

Step-by-step explanation:

a) First, you have to know how much the price changed by. Do this by taking the final price and subtracting the initial price.

         210 - 282 = -72

Because the answer is negative, that means the price decreased. Then, you take the percentage of the original price that changed. So basically, take how much the price changed and divide it by the original price (without the negative, of course).

         72/282 = .255

Multiply by 100 to get the actual percentage.

         .255 x 100 = 25.5

And your answer is 25.5% decrease in price.

b) Same method as the first problem, but with test scores. So take the final test score minus the original score.

         30 - 20 = 10

Because the answer is positive, the score increased. Then divide this difference by the original test score.

         10/20 = .5

Then multiply by 100 for the percentage.

         .5 x 100 = 50%

And your answer is 50% increase in price.

Answer 2

Step-by-step explanation:

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