You can use the is/of = %/100 formula, and just simply input the values.
Therefore, 170/580=%/100
580x=170,000
29.31
#1 is 125
#3 is 1/2
#5 is the same as the question
#7 is 5p^3 over 3
#9 is 4/5
This can either be done by multiplying with 125% (1.25) or, by dividing by dividing on 4 and adding a part.
This is the easiest way, tho.
60*1.25=75
The correct answer is 75 mph.
The answer is A because you would do 79 x 0.05 which equals 3.95 . So you subtract 3.95 from 79 which is 75.05 minus 50 equal to 25.05