Respuesta :
Okay so 18/20 you know can be simplified to 9/10
Since it is out of 10 now it is easy to multiply by 10 so it is out of 100 like a percentage is
Now you have
90/100 which is 90%
Since it is out of 10 now it is easy to multiply by 10 so it is out of 100 like a percentage is
Now you have
90/100 which is 90%