Tara and her friends go to lunch to celebrate her birthday. Their bill is $100. Tara and her friends want to tip the waiter 20%. What will be the total cost of their bill including the tip?



Answer :

Total cost including tip

Total cost = 100 + 100*20%

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20% = 0.2

Total cost = 100( 1 + 0.2)

= 120

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