Diana had 80% as many chocolate bars as Pamela. Diana gave away 10% of her chocolate bars and Pamela bought another 60 chocolate bars. As a result, Diana now has 60% as many chocolate bars as Pamela. Find the number of chocolate bars that Diana had in the end.
| |
Diana |
Pamela |
| Before |
4x3 |
5x3 |
| Change |
- 0.4x3 |
+ 60 |
| After |
3.6x3 |
5x3 + 60 |
Comparing Diana and
Pamela in the end |
3x3.6 |
5x3.6 |
| |
Diana |
Pamela |
| Before |
12 u |
15 u |
| Change |
- 1.2 u |
+ 60 |
After
|
10.8 u
|
15 u + 60 =
18 u |
80% =
80100 =
4510% x 4
=
10100 x 4
= 0.4
60% =
60100 =
35The number of chocolate bars that Diana had in the end is repeated.
Make the number of chocolate bars that Diana had in the end the same.
The number of chocolate bars that Pamela had in the end is repeated.
15 u + 60 = 18 u
18 u - 15 u = 60
3 u = 60
1 u = 60 ÷ 3 = 20
Number of chocolate bars that Diana had in the end
= 10.8 u
= 10.8 x 20
= 216
Answer: 216
