- 180
- 90
- 45
- 22.5
- Answer not known

Option 2 : 90

**Calculation:**

Let assume that number be x

x - 40% of x = 120

⇒ (60x/100) = 120

⇒ x = 200

45% of 200 = (45/100) × 200

⇒ (45/100) × 200 = 90

∴ 45% of the number is 90

The correct option is 2 i.e. 90

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