Emma had 90% as many candy canes as Jane. Emma gave away 20% of her candy canes and Jane bought another 10 candy canes. As a result, Emma now has 70% as many candy canes as Jane. Find the number of candy canes that Emma had in the end.
| |
Emma |
Jane |
| Before |
9x7 |
10x7 |
| Change |
- 1.8x7 |
+ 10 |
| After |
7.2x7 |
10x7 + 10 |
Comparing Emma and
Jane in the end |
7x7.2 |
10x7.2 |
| |
Emma |
Jane |
| Before |
63 u |
70 u |
| Change |
- 12.6 u |
+ 10 |
After
|
50.4 u
|
70 u + 10 =
72 u |
90% =
90100 =
91020% x 9
=
20100 x 9
= 1.8
70% =
70100 =
710The number of candy canes that Emma had in the end is repeated.
Make the number of candy canes that Emma had in the end the same.
The number of candy canes that Jane had in the end is repeated.
70 u + 10 = 72 u
72 u - 70 u = 10
2 u = 10
1 u = 10 ÷ 2 = 5
Number of candy canes that Emma had in the end
= 50.4 u
= 50.4 x 5
= 252
Answer: 252
