14 days ago, Yoko had a total of 240 green and pink coins. 25% of her coins were pink coins. Today, her grandfather gave her some more coins. As a result, her green coins increased by 40%. Now, 50% of her coins are pink coins. How many pink coins did her grandfather give her?
| |
Pink coins |
Green coins |
Total
coins |
| Before |
1 u |
3 u |
240 |
| Change |
+ 3.2 u |
+ 1.2 u |
|
| After |
4.2 u |
4.2 u |
|
Comparing the
green coins and
pink coins in the end |
1 |
1 |
|
25% =
25100 =
14 Pink coins : Green coins = 1 : 3
Increase in the number of green coins
= 40% x 3 u
=
40100 x 3 u
= 1.2 u
50% =
50100 =
12 In the end
Pink coins : Green coins = 1 : 1
Number of coins at first
= 3 u + 1 u
= 4 u
4 u = 240
1 u = 240 ÷ 4 = 60
Number of pink coins that Yoko received from her grandfather
= 4.2 u - 1 u
= 3.2 u
= 3.2 x 60
= 192
Answer(s): 192
