If you miss one question on a 90 question test, what is the score

so, 90 questions make for 100 % marks

so that

1 q makes for 100/90 % marks

i.e. 10 / 9 % marks.

iso with 1 miss, you loose 10/9 %

so marks received = 100 - 10/9

= 890/9 %

= 98.88 %

It depends on how much marks was the question worth.

89/90 would be the most I guess if every question was worth 1 mark.