Question 881863
two ounces diluted
.90*2=.01*(2+x)
x = 178.
You have to add 178 ounces to two ounces of DMSO to get it down to 1%

Remember you have almost full strength and want to cut down to almost nothing going from 90% (.9) to 1% (.01)

To dilute the whole bottle would be 4 times (4*178=712 ) that amount.