Amountx The total amount is the unknown quantity x that we need to find. If your calculator does not have such a button multiply your previous answer by 100 to determine the percentage. If the percentage is an increase then add it to 100 if it is a decrease then.
There are many formulas for percentage problems.
Add or subtract a percentage from a number or solve the equations. The original cost was 600. The percentage value or new value is calculated by multiplying the original value by the percent rate and dividing by 100. Original price 30original price sale price.