400 Out of 600 as a Percentage

What is 400 out of 600 as a percentage?
Percentage = Relative ValueReference Value x 100
400/600 as a percent = 400/600 x 100
= (2 x 200)/(3 x 200) x 100
= 2/3 x 100
= 200/3
= 66.67
400/600 as a percentage is 66.67%.