Question

Mr. Porter owns a house. When he first bought the house it was valued at d dollars. Since then, the value of the house has increased. Mr. Porter writes the equation below to express the current value of his house. d+0.21d=1.21d d+0.21d=1.21d Mr. Porter claims that the value of his house has increased by 121% 121%, since 1.21 is equal to 121% 121%. Decide if Mr. Porter is correct. If he is correct, enter 121 below. If he is not correct, enter the correct percent increase.

Answer 1

Mr. Porter's claim was not correct and it will be a 21% increment.

Step-by-step explanation:

The value of the house when Mr. Porter bought the house was d.

The present value of the house is given by d + 0.21d = 1.21d.

Hence, the increase in the value of the house is 0.21 d and the final value of the house is 1.21d.

So, if Mr. Porter claims that the value of his house has increased by 121%, then his claim is wrong. The increase in value is only by 0.21d i.e. by 21% and after this increment, the value becomes 1.21d i.e. 121%.

Therefore, his claim is not correct and it will be a 21% increment. (Answer)