Nora had 80% as many chocolate bars as Wendy. Nora gave away 10% of her chocolate bars and Wendy bought another 45 chocolate bars. As a result, Nora now has 60% as many chocolate bars as Wendy. Find the number of chocolate bars that Nora had in the end.
| |
Nora |
Wendy |
| Before |
4x3 |
5x3 |
| Change |
- 0.4x3 |
+ 45 |
| After |
3.6x3 |
5x3 + 45 |
Comparing Nora and
Wendy in the end |
3x3.6 |
5x3.6 |
| |
Nora |
Wendy |
| Before |
12 u |
15 u |
| Change |
- 1.2 u |
+ 45 |
After
|
10.8 u
|
15 u + 45 =
18 u |
80% =
80100 =
4510% x 4
=
10100 x 4
= 0.4
60% =
60100 =
35The number of chocolate bars that Nora had in the end is repeated.
Make the number of chocolate bars that Nora had in the end the same.
The number of chocolate bars that Wendy had in the end is repeated.
15 u + 45 = 18 u
18 u - 15 u = 45
3 u = 45
1 u = 45 ÷ 3 = 15
Number of chocolate bars that Nora had in the end
= 10.8 u
= 10.8 x 15
= 162
Answer: 162
