john bought a full basket of mangoes when he got home he realised 12 out of the 20 mangoes he bought are bad what is the probability of the good ones

12/20 mangoes are bad so 8/20 mangoes are good and to convert to a percentage we make the denominator 100.
To make 20 to 100 we times by 5 so we do the same to the numerator which is 8
So 8x5 = 40%
Give me brainliest answer plz
And hope it helps!

The scale factor of what ?