Kathy and Sabrina shared some marbles. Kathy had 50% of what Sabrina had at first. Kathy then gave Sabrina
37 of what she had. How many less percent did Kathy have than Sabrina in the end? Correct the answer to 1 decimal place.
| |
Kathy |
Sabrina |
Comparing Kathy
and Sabrina at first |
2x7 =
14 u |
1x7 =
7 u |
| Before |
7x2 =
14 u |
|
| Change |
- 3x2 =
- 6 u |
+ 3x2 =
+ 6 u |
| After |
4x2 =
8 u |
13 u |
50% =
50100 =
12The number of marbles that Kathy had at first is repeated. Make the number of marbles that Kathy had at first the same. LCM of 2 and 7 is 14.
Number of marbles that Sabrina had in the end
= 7 u + 6 u
= 13 u
Number of less marbles that Kathy had than Sabrina in the end
= 13 u - 8 u
= 5 u
Number of less marbles that Kathy had than Sabrina in the end in percent
=
513 x 100%
≈ 38.5%
Answer(s): 38.5%
