Vaidev was fixing a jigsaw puzzle. On the second day, the number of pieces he fixed was 20% of the total number of pieces. After another two weeks, he fixed another 168 pieces and was left with 10% of the jigsaw puzzle unfixed. How many pieces were left unfixed?
| |
Fixed |
Unfixed |
Total |
Before
|
1 x 2 =
2 u |
4 x 2 =
8 u |
5 x 2 =
10 u |
| Change |
+ 168 |
- 168 |
|
After |
9 u |
1 u |
10 x 1 =
10 u |
20% =
20100 =
15 Fixed : Total = 1 : 5
10% =
10100 =
110 Unfixed : Total = 1 : 10
Number of more pieces that Vaidev fixed
= 9 u - 2 u
= 7 u
7 u = 168
1 u = 168 ÷ 7 = 24
Number of pieces left unfixed
= 1 u
= 1 x 24
= 24
Answer: 24
