If the score is 90% and the total is 70 what is the number correct?

If you mean that the total number of questions is 70, then:

1. You need to figure out what 90% is of the total, 70.

2. Do this by multiplying 70 by 90% - - > 70 * (.9)

3. 90% of 70 is 63. The total number correct is 63.

You can check your work by figuring out what percentage 63 is of 70. 63 divided by 70 (63/70) is. 9, or 90%.