Given: Population increases annually = 8% Present population = 23,328 Formula Used: Population 2 years ago × (100 + increase%)/100 × (100+ increase%)/100 = Present Population Calculation: Population 2 years ago × (100 + increase%)/100 × (100+ increase%)/100 = Present Population ⇒ Population 2 years ago
=23,328×(100/108)×(100/108)
⇒ Population 2 years ago = 20,000 ∴ 2 years ago population was 20,000.