Risa and Xandra shared some erasers. Risa had 25% of what Xandra had at first. Risa then gave Xandra
37 of what she had. How many more percent did Xandra have than Risa in the end? Correct the answer to 1 decimal place.
| |
Risa |
Xandra |
Comparing Risa
and Xandra at first |
4x7 =
28 u |
1x7 =
7 u |
| Before |
7x4 =
28 u |
|
| Change |
- 3x4 =
- 12 u |
+ 3x4 =
+ 12 u |
| After |
4x4 =
16 u |
19 u |
25% =
25100 =
14The number of erasers that Risa had at first is repeated. Make the number of erasers that Risa had at first the same. LCM of 4 and 7 is 28.
Number of erasers that Xandra had in the end
= 7 u + 12 u
= 19 u
Number of more erasers that Xandra had than Risa in the end
= 19 u - 16 u
= 3 u
Number of more erasers that Xandra had than Risa in the end in percent
=
316 x 100%
≈ 18.8%
Answer(s): 18.8%
