Answer: 52 ml was withdrawn from the bottle
Step-by-step explanation: 80ml was the total quantity that is its 100% of the solution
65% was withdrawn so let's keep the quantity as x
100% = 80ml
65% = x
# x × 100% - 80 × 65
x = 80 × 65 ÷ 100
x = 52 ml
~ 52 ml of the total quantity was withdrawn