On Monday, there were 10 more adults than children at the theme park. On Tuesday, the number of adults increased by 80% and the number of children increased by 60%. There were 205 people on Tuesday. How many adults were there on Monday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
10 more |
|
|
| Before |
5 u |
+ 10 |
5 u |
|
| Change |
+ 4 u |
+ 8 |
+ 3 u |
|
| After |
9 u |
+ 18 |
8 u |
205 |
80% =
80100 =
45 80% x 10 =
45 x 10 = 8
10 + 8 = 18
60% =
60100 =
35 Total number of people on Tuesday
= 9 u + 18 + 8 u
= 17 u + 18
17 u + 18 = 205
17 u = 205 - 18
17 u = 187
1 u = 187 ÷ 17 = 11
Number of adults on Monday
= 5 u + 10
= 5 x 11 + 10
= 55 + 10
= 65
Answer(s): 65
