Zane was fixing a jigsaw puzzle. On the second day, the number of pieces he fixed was 60% of the total number of pieces. After another two weeks, he fixed another 120 pieces and was left with 10% of the jigsaw puzzle unfixed. How many pieces were left unfixed?
| |
Fixed |
Unfixed |
Total |
Before
|
3 x 2 =
6 u |
2 x 2 =
4 u |
5 x 2 =
10 u |
| Change |
+ 120 |
- 120 |
|
After |
9 u |
1 u |
10 x 1 =
10 u |
60% =
60100 =
35 Fixed : Total = 3 : 5
10% =
10100 =
110 Unfixed : Total = 1 : 10
Number of more pieces that Zane fixed
= 9 u - 6 u
= 3 u
3 u = 120
1 u = 120 ÷ 3 = 40
Number of pieces left unfixed
= 1 u
= 1 x 40
= 40
Answer: 40
