Brenna bought cupcakes for her sister's birthday party. 45 out of the 50 cupcakes had sprinkles on top. What percentage of the cupcakes had sprinkles?

90 percent

Step-by-step explanation:

I'm pretty sure it is 90. I hated doing percentages. Every time we did a math test our teacher would give us back the paper and make us calculate the percentage ourselves.

X+ y = 79
1.65x + 1.36y = $118.17

step 1: x + y = 79
- x - x

y = 79 - x


step 2: 1.65x + 1.36 ( 79 - x) = 118.17
1.65x + 107.44 - 1.36x = 118.17
0.29x + 107.44 = 118.17
- 107.44 - 107.44

0.29x = 10.73

0.29x 0.29x

x = 37


step 3: 37 + y = 79
- 37 - 37

y = 42


final answer: (37, 42)