The answer is 14%
Cost of meal is 100%: $18.50 is 100%
Tip is x%: $2.59 is x
Make a proportion:
$18.50 : 100% = $2.59 : x
x = 100% * $2.59 : $18.50
x = 14%
To do this i add them uo and easily subtract woth a hand held calculator
You could do a few (3-4)milk carton
Depending on the way you look at the numbers, they are increasing/decreasing by 0.1.
0.36- 0.1 =0.26
0.26-0.1=0.16
0.16-0.1=0.06
0.06-0.1=-0.04
-0.04-0.1=-0.14
(Or vice versa by adding 0.1 starting with -0.14)
Make sense?
