i) If Halim's profit selling the pair of shoes of $45 is 120%, to find the cost pricer of the pair of shoes, we just need to divide the value by the profit:
Cost = 45/120% = 45/1.2 = $37.5
ii) To find his profit, we just need to subtract the selling value by the cost price:
Profit = 45 - 37.5 = $7.5
The loss that he would have if he sells the pair of shoes at $25 is:
The equation has to (or be transformed to) contain one object in the left side and the other object at the right side multiplied by a constant, without an independent term.