Vanessa's uncle's weight to her weight is 7 : 3. If Vanessa puts on 25% more weight, by what percentage must her uncle's weight be reduced by so that their total weight remains unchanged as before? Correct the answer to 1 decimal place.
|
Vanessa's uncle |
Vanessa |
Total |
Before |
7 u |
3 u |
10 u |
Change |
- 0.75 u |
+ 0.75 u |
|
After |
6.25 u |
3.75 u |
10 u |
Amount of weight that Vanessa puts on
= 25% x 3 u
=
25100 x 3 u
= 0.75 u
The total weight remains unchanged.
Percentage of weight that Vanessa's uncle must be reduced by
=
0.757 x 100%
≈ 10.7% (Correct to 1 decimal place.)
Answer(s): 10.7%