7/10=70/100=70%, so the answer is seventy-percent.
This would be a great question to just plug into a calculator. I'm sure you will find the answer quite easily if you use a calculator.
42,500x0.09 should get you your commission
Solve for b in y = mx + b.
Subtract b from both sides, then subtract y from both sides.
-b = mx - y
C) mx - y = -b
0.7=7/10
0.8=8/10
0.75=3/4 this is between 0.7 and 0.8