Estimate a 15% tip on a dinner bill of $81.66 by first rounding the bill amount to the nearest ten dollars.

12 dollars

Step-by-step explanation:

Round the bill to the nearest ten dollars

81.66 rounds to 80 dollars

80 * 15%

80 *.15

12

The tip is 12 dollars

81.66/100*115 = 93.909 rounding down to $90

Step-by-step explanation:

for future students the answer is b

hope i

-lavira: )