The number of Kidney patients in Australia is approximately _______ of the number of patients of heart disease in the world.

Correct option is B

Total number of kidney patient = 30% of 80 crore
Total number of kidney patient in Australia = 5% × 30% × 80 crore = 15 × 800000 = 12000000
Total patient of heart disease in the world = 22% × 80,0000000 =176000000
Now, required percentage = 12000000 × 100/176000000 = 1200/176 = 6.82%