Can someone explain to me how to change a fraction to a decimal example: 4 over 5

You have to divide the numerator (the top number) by the denominator (the bottom number) so it's .8 or percentage would be 8%

U would divide 4 and 5. Since 4 is smaller than 5, you would put a decimal after 4 and put a 0 after the decimal. So it should look like this 4.0 divided by 5 and put the decimal up to the quotient and just divide normal and u should get 0.8

Cbottom left is the correct one.