Question

Antoine and Tess have a disagreement over how to compute a 15% gratuity on $46.00. Tess says, “It is easy to find 10% of 46 by moving the decimal point one place to the left to get $4.60. Do that twice. Then add the two amounts to get 4 dollars and 60 cents + 4 dollars and 60 cents = 9 dollars and 20 cents for the 15% gratuity.” How should Antoine respond to Tess’s method?

Answer 1

Answer:

Tess is right about it being easy to find 10% of 46 by moving the decimal point 1 place to the left to get 4.6 but there is no need to twice because if we do 10% twice it be 20%.