The cost of a particular item is $308, which includes GST at 10%. Find the GST.

Step 1: Understand that the cost of the item includes the Goods and Services Tax (GST). In this case, the GST is 10% of the original price.

Step 2: Let's denote the original price (before GST) as X. Since the GST is 10% of the original price, the GST amount would be 0.10X.

Step 3: The total cost of the item is the original price plus the GST. So, $308 = X + 0.10X.

Step 4: Combine like terms on the right side of the equation to get $308 = 1.10X.

Step 5: Solve for X (the original price before GST) by dividing both sides of the equation by 1.10. So, X = $308 / 1.10 =$280.

Step 6: Now that we know the original price, we can find the GST by subtracting the original price from the total cost. So, GST = $308 -$280 = $28.