Chloe and jonathon had dinner at a restaurant and the bill was
$65. after adding the tip, the final amount paid was $78. what is
the percent increase of the bill after adding the tip?
a. 2%
b. 13%
c. 20%
d. 22%

C.20%

Step-by-step explanation:

To solve the problem you first need to find the part that is the tip.

78-65=13

Then you cross multiply and divide

=

When you cross multiply and divide you should get 20 for X makeing the tip 20%.

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)