Answer:
69
Step-by-step explanation:
P = 12 + 5x
P = a + b + c
P = 7 + (x + 4) + (4x + 1)
= 7 + x + 4 + 4x + 1
= 12 + 5x
As a fraction:
11/36
As a Decimal:
0.30555555
20%
to figure this out yourself you could simply do 100/500 = 0.2 which translates to 20%