Paul was fixing a jigsaw puzzle. On the second day, the number of pieces he fixed was 50% of the total number of pieces. After another two weeks, he fixed another 200 pieces and was left with 30% of the jigsaw puzzle unfixed. How many pieces were left unfixed?
|
Fixed |
Unfixed |
Total |
Before
|
1 x 5 = 5 u |
1 x 5 = 5 u |
2 x 5 = 10 u |
Change |
+ 200 |
- 200 |
|
After |
7 u |
3 u |
10 x 1 = 10 u |
50% =
50100 =
12 Fixed : Total = 1 : 2
30% =
30100 =
310 Unfixed : Total = 3 : 10
Number of more pieces that Paul fixed
= 7 u - 5 u
= 2 u
2 u = 200
1 u = 200 ÷ 2 = 100
Number of pieces left unfixed
= 3 u
= 3 x 100
= 300
Answer: 300