Anna and Nora shared some erasers. Anna had 50% of what Nora had at first. Anna then gave Nora
78 of what she had. How many less percent did Anna have than Nora in the end? Correct the answer to 1 decimal place.
| |
Anna |
Nora |
Comparing Anna
and Nora at first |
2x4 =
8 u |
1x4 =
4 u |
| Before |
8x1 =
8 u |
|
| Change |
- 7x1 =
- 7 u |
+ 7x1 =
+ 7 u |
| After |
1x1 =
1 u |
11 u |
50% =
50100 =
12The number of erasers that Anna had at first is repeated. Make the number of erasers that Anna had at first the same. LCM of 2 and 8 is 8.
Number of erasers that Nora had in the end
= 4 u + 7 u
= 11 u
Number of less erasers that Anna had than Nora in the end
= 11 u - 1 u
= 10 u
Number of less erasers that Anna had than Nora in the end in percent
=
1011 x 100%
≈ 90.9%
Answer(s): 90.9%
