Answer:
20%
Step-by-step explanation:
With those changes, the fraction is multiplied by ...

That is, the value of the fraction is decreased by 20%.
80 because when u do 10 times 8 it’s 80
A) 90-55=35 since a right angle is 90 total\
b)ii
F(x)=125-(125*0.2x)
to find the value of the phone after 3 years, you put x=3.
f(3)=125-(125*0.2(3))
f(3)=50