Question

Marlye posted a story on her blog. On the first day there were 80 responses and on the second day there were 180 responses. What percent is the increase, 100, of the original number of responses, 80?

55%
80%
100%
125%

Answer 1

80 * 80% = 64 So it's not A

80 * 55% = 44 so it's not B

80 * 100% = 80 so it's not C

80 * 125% = 100 so D is your answer

Explanation:

Answer 2

125%

Explanation:

Given,

Responses on first day or original responses = 80

While responses on second day or final responses = 180,

Thus, the percentage increase in the responses

`=\frac{\text{ final responses- original responses}}{\text{original responses}}* 100`

`=(180-80)/(80)* 100`

`=(10000)/(80)`

`=125\%`

Hence, fourth option is correct.