If the cost price is 70% of selling price. Then what is the profit percent.

Sure, here is the step by step solution:

Step 1: Let's assume the selling price (SP) is 100 units (it could be dollars, pounds, etc., but we'll use a generic term for simplicity).

Step 2: Given that the cost price (CP) is 70% of the selling price, we calculate the cost price as 70% of 100 units, which equals 70 units.

Step 3: The profit is calculated as the selling price minus the cost price. So, profit = SP - CP = 100 units - 70 units = 30 units.

Step 4: The profit percentage is calculated as (Profit / CP) * 100. So, profit percentage = (30 units / 70 units) * 100 = 42.86%.

So, the profit percentage is 42.86%.