60/96 = 0.625 , times that by 100 gives you the percentage of 62.5%

We can begin by rearranging this into multiplication:

Now we can factor the numerators and denominators:

The factors
(x+4) and
(x+2) cancel out, leaving us with:

Our answer comes out to be:

or

Based on the numerator of the second fraction (since we used its inverse), the denominators of both, and the factors we canceled out earlier, the restrictions are
x ≠ -4, -3, -2, -1, 4
Answer: perceived lack of anonymity
Step-by-step explanation:
The source of bias that occurs when a group of students are asked to evaluate their teacher mid-quarter is a perceived lack of anonymity.
Perceived lack of anonymity occurs when the responder is afraid that if he or she gives an honest answer, it can end up affecting them negatively.
In this case, the students may be afraid that giving an honest opinion on the teacher will affect them.