Question

17 out of 20 lung diseases are curable; what is the percentage of lung diseases that are curable?
A. 17%
B. 72%
C. 85%
D. 87%
E. 90%
F. None of these

Answer 1

We can apply some easy logic here,
If 17 diseases are curable out of 20,
how many diseases can be cured out of 100?
Therefore,
17 - 20
x - 100
Cross multiplying,
$x = \frac{100 \times 17}{20}$
$x = 17 \times 5$
$x = 85$
The correct answer is C) 85%

Answer 2

Answer:17%

Step-by-step explanation: