Question 999143
20*0.025=0.5 fl oz oil
That needs to be (0.02) of the total amount, x
0.02 is 1/50
So the same amount of oil, 0.5 fl oz, is 1/50 of the total amount of mix, so the total amount of mix is 25 ml.
You need to add 5 ml gas.
0.5/25=0.02 or 2%