Erika and Sarah shared some marbles. Erika had 80% of what Sarah had at first. Erika then gave Sarah
38 of what she had. How many less percent did Erika have than Sarah in the end? Correct the answer to 1 decimal place.
| |
Erika |
Sarah |
Comparing Erika
and Sarah at first |
5x8 =
40 u |
4x8 =
32 u |
| Before |
8x5 =
40 u |
|
| Change |
- 3x5 =
- 15 u |
+ 3x5 =
+ 15 u |
| After |
5x5 =
25 u |
47 u |
80% =
80100 =
45The number of marbles that Erika had at first is repeated. Make the number of marbles that Erika had at first the same. LCM of 5 and 8 is 40.
Number of marbles that Sarah had in the end
= 32 u + 15 u
= 47 u
Number of less marbles that Erika had than Sarah in the end
= 47 u - 25 u
= 22 u
Number of less marbles that Erika had than Sarah in the end in percent
=
2247 x 100%
≈ 46.8%
Answer(s): 46.8%
