Mary and Kylie shared some erasers. Mary had 30% of what Kylie had at first. Mary then gave Kylie
25 of what she had. How many more percent did Kylie have than Mary in the end? Correct the answer to 1 decimal place.
| |
Mary |
Kylie |
Comparing Mary
and Kylie at first |
10x1 =
10 u |
3x1 =
3 u |
| Before |
5x2 =
10 u |
|
| Change |
- 2x2 =
- 4 u |
+ 2x2 =
+ 4 u |
| After |
3x2 =
6 u |
7 u |
30% =
30100 =
310The number of erasers that Mary had at first is repeated. Make the number of erasers that Mary had at first the same. LCM of 10 and 5 is 10.
Number of erasers that Kylie had in the end
= 3 u + 4 u
= 7 u
Number of more erasers that Kylie had than Mary in the end
= 7 u - 6 u
= 1 u
Number of more erasers that Kylie had than Mary in the end in percent
=
16 x 100%
≈ 16.7%
Answer(s): 16.7%
