He would need a 93% on his fourth exam.
94+89+96+93= 372, 372 divided by 4= 93
The whole part will be the 4. The fraction part will be the decimal. That converts to the fraction 25/40. Therefore, 4.625 as a mixed number is 4 and 25/40.
9 * 25 = 225
225 - 6 = 219
There are 219 chairs left.
