In this example work out 212 106 200 212 106 200 The amount before the sales tax was added is 200. Enter an equal sign followed by an open parenthesis to begin creating the formula. Here is the formula that is commonly used.
Its just reversing the original multiplication of 100 X 120.
Add these two numbers together to get the addition of two percentages. Percent increase 60. Enter an equal sign followed by an open parenthesis to begin creating the formula. Use this to specify the number of decimal places that you want to display.