Set up an equation 20=k(0.4)....to find k divide 20 by 0.4
c is the correct answer of this question
I don’t know the answer sorry
Answer:
Please see attached picture for full solution.
Percent decrease=decrease/original times 100
decreas=860-790=70
original=860
percent decrease=70/860 times 100
percent decrease=0.0813953 times 100
percent decrease=8.13953
about 8%