if tests are worth 5% of my grade and the following test grades are worth 2% of the 5% of my grade 67% 67% 100% and the others 100% 75% 75% are worth 3% of that 5% how but i got a zero on a quiz and they are worth 85% of my grade and this one was worth 23% of the 85% and my grade before all that was 30% whats my grade ow

To calculate your grade, we first calculate the total points you received for tests:

(0.02 * 67) + (0.02 * 67) + (0.02 * 100) + (0.03 * 100) + (0.03 * 75) + (0.03 * 75) = 3.38

Now we calculate the weighted average for tests:
(3.38 / 5) * 5 = 3.38

Now we calculate the points you received for the quiz:
0.23 * 0 = 0

Now we calculate the weighted average for the quiz:
(0 / 85) * 85 = 0

Now we calculate your overall grade:
(3.38 + 0) / 5 = 0.676

Therefore, your overall grade is 67.6%.