Answer :
First, set up your equation
8=.1x
Next, divide everything by .1
8/.1=.1x/.1
80=x
8=.1x
Next, divide everything by .1
8/.1=.1x/.1
80=x
um that should be easy. 10% means there are 10 more 10%'s to reach 100% and if 8 is 10% you have 10 8's and that's 80.
