The sale price is $630. 900/100 is 9( which is 1%) then multiply 9 and 30. Which gives you 270. Since it is a discount you subtract the 270 from the 900 which equals 630! Hope this helps!
First, multiply the original price by the decimal of the percentage:
900 x 0.30 = 270
Since this is a discount we subtract the original amount and the discount amount. If it we were calculating tax or a raised price, you would add. But were lowering the price so:
