Olivia and Barbara shared some marbles. Olivia had 50% of what Barbara had at first. Olivia then gave Barbara
35 of what she had. How many less percent did Olivia have than Barbara in the end? Correct the answer to 1 decimal place.
| |
Olivia |
Barbara |
Comparing Olivia
and Barbara at first |
2x5 =
10 u |
1x5 =
5 u |
| Before |
5x2 =
10 u |
|
| Change |
- 3x2 =
- 6 u |
+ 3x2 =
+ 6 u |
| After |
2x2 =
4 u |
11 u |
50% =
50100 =
12The number of marbles that Olivia had at first is repeated. Make the number of marbles that Olivia had at first the same. LCM of 2 and 5 is 10.
Number of marbles that Barbara had in the end
= 5 u + 6 u
= 11 u
Number of less marbles that Olivia had than Barbara in the end
= 11 u - 4 u
= 7 u
Number of less marbles that Olivia had than Barbara in the end in percent
=
711 x 100%
≈ 63.6%
Answer(s): 63.6%
