Dana and Xuan shared some erasers. Dana had 75% of what Xuan had at first. Dana then gave Xuan
37 of what she had. How many less percent did Dana have than Xuan in the end? Correct the answer to 1 decimal place.
| |
Dana |
Xuan |
Comparing Dana
and Xuan at first |
4x7 =
28 u |
3x7 =
21 u |
| Before |
7x4 =
28 u |
|
| Change |
- 3x4 =
- 12 u |
+ 3x4 =
+ 12 u |
| After |
4x4 =
16 u |
33 u |
75% =
75100 =
34The number of erasers that Dana had at first is repeated. Make the number of erasers that Dana had at first the same. LCM of 4 and 7 is 28.
Number of erasers that Xuan had in the end
= 21 u + 12 u
= 33 u
Number of less erasers that Dana had than Xuan in the end
= 33 u - 16 u
= 17 u
Number of less erasers that Dana had than Xuan in the end in percent
=
1733 x 100%
≈ 51.5%
Answer(s): 51.5%
