India’s population increased from 439 million in 1961 to 1028 million in 2001. Find total increase and write in Indian System with commas.
Increase = 589 million = 58,90,00,000
Step 1: Write the numbers.
2001 population = \(1028\) million
1961 population = \(439\) million
Step 2: Subtract to get the increase.
\(\text{Increase} = 1028 - 439\)
\(= 589\) million
Step 3: Write \(589\) million in digits.
\(589\text{ million} = 589,000,000\)
Step 4: Put commas in the Indian System.
From the right: first 3 digits, then groups of 2 digits.
\(589,000,000 \rightarrow 58,90,00,000\)
Final: Increase = \(589\) million = \(58,90,00,000\) (\(58\) crore \(90\) lakh).