Question

Yesterday Nina's lunch cost 9.80 and she left a 1.47 tip. Today Nina's lunch costs 12.60. If she tops the same rate that she did yesterday, how much tip should Nina leave?

Answer 1

1.47 would be a 15% tip. 15% of 12.60 is $1.89.

Answer 2

9.8t=1.47

t=.15 (15% tip)

12.6(.15)=$1.89