You can
put this solution on YOUR website!if a regular donat has 100% calori then you will get 10% calori from a diet one.
how many 10% calori giving diet donuts is eqaul to a regular donut which gives 100 % calori.
find their ratio:

=10
so if you enjoy eating diet and do not enjoy losing fat; eat 10 diet donuts instead of one regular one