So lets say for example you have 4 remainder 2. To turn that into a decimal you have to divide the whole number by the remainder to make to fraction. So now you have 4 2/4 which is the same as 4 1/2. To turn the fraction into a decimal you do 100 divided by the denominator (2) which is 50, and then multiply by the top numerator (1). Now you add on the whole number (4) onto your other number/100 (50/100=0.5) to make 4.5.
Examples:
5 remainder 4:
4/5 = (100/5 x 4) 20 x 4 = 80
80/100=0.08
0.08 + 5= 5.08
If you have a denominator that goes into 10 easily (2, 4, 5, 10) then you just have to multiply the numerator (top number) by the same number as the bottom to make 10, and then just turn that into a decimal:
Example:
4 remainder 3:
3/4 x 2.5 = 7.5/10
=75/100 = 0.75
0.75 + 4 = 4.75