In division with fractions, you flip the sign to multiplication and multiply it by the reciprocal. So, you do
1/1/5 (the / after the one means division because I don't have the sign in my keyboard)
1 * 1/5 (* means multiplication)
1/1 * 5/1
Then solve.
1/1*5/1= 5/1=5
So, 1 divided by 1/5 is 5.
