Jane's uncle's weight to her weight is 4 : 3. If Jane 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.
| |
Jane's uncle |
Jane |
Total |
| Before |
4 u |
3 u |
7 u |
| Change |
- 0.75 u |
+ 0.75 u |
|
| After |
3.25 u |
3.75 u |
7 u |
Amount of weight that Jane puts on
= 25% x 3 u
=
25100 x 3 u
= 0.75 u
The total weight remains unchanged.
Percentage of weight that Jane's uncle must be reduced by
=
0.754 x 100%
≈ 18.8% (Correct to 1 decimal place.)
Answer(s): 18.8%
