It is not the strength of your prescription but how well you can see with it, and without it. You don't say whether your prescription is +2.5 and +2.75 or -2.5 and -2.75, which makes a big difference.
Most people are nearsighted so I am going to assume you are (this would be with the minus signs). I think that you would might just barely pass the requirement for 6/36 without spectacles. Unless there is something else wrong with your eyes, you should pass the tests with spectacles without difficulty.
My sight is -2.5 and -2.75. Many thanks. I hope I will pass.Fingers crossed.