Question

 In the first week of​ July, a record 1040 people went to the local swimming pool. In the second​ week, 110 fewer people went to the pool than in the first week. In the third​ week, 130 more people went to the pool than in the second week. In the fourth​ week, 228 fewer people went to the pool than in the third week. What is the percent decrease in the number of people who went to the pool over these four​ weeks?

Answer 1

In July:

First week:

Number of people went to the local swimming pool =1040

Second week:

110 fewer people went to the pool than in the first week

so,

Number of people went to the local swimming pool =1040-110

=930

Third week:

130 more people went to the pool than in the second week

so,

Number of people went to the local swimming pool =930+130

=1060

Fourth week:

228 fewer people went to the pool than in the third week

so,

Number of people went to the local swimming pool =1060-228

=832

Decrease in number of people over four week= number of people in first week - number of people in fourth week

Decrease in number of people over four week=1040-832

=208

now, we can find percentage

Percentage is

$=\frac{208}{1040} \times 100$

=20%.........Answer