236.00 + 17% = 276.12
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add 2% to the total
The tip would be 8.88 Divide the bill by 10 - giving 5.92. Divide that figure by 2 - giving 2.96 (this is 5% !) Add the two figures together, and the result is 15% of the bill.
To add 20 percent to a number, multiply the number by 1.2. For example, adding 20 percent to 50 gives 50 x 1.2 = 60.
If we add 33 percent three times, we get 99 percent (33% + 33% + 33% = 99%). To reach 100 percent, we need to add the remaining 1 percent. Mathematically, this would be expressed as 33% + 33% + 33% + 1% = 100%.
23% just multiply by 100 and add the percent sign in the back of your answer.