A number increased by 20% gives 600. The number is Choose the correct choice
A) 250
B) 400
C) 450
D) 500
E) 520

Rationale: "formula = total = 100 % , increse = ` ` + ' ' decrease = ` ` - ' ' a number means = 100 % that same number increased by 20 % = 120 % 120 % - - - - - - - > 600 ( 120 × 5 = 600 ) 100 % - - - - - - - > 500 ( 100 × 5 = 500 ) d )"
Answer: D