Mr. Slacker guessed he would have 60 students, but ended up with with 110. What is the percent error?

PLEASE HELP!! Any help will be greatly appreciated!

-83% or 83% if absolute value is accepted

Step-by-step explanation:

Percent error is the difference between a measured or experiment value and an accepted or known value, divided by the known value, multiplied by 100%.

For many applications, percent error is always expressed as a positive value. The absolute value of the error is divided by an accepted value and given as a percent.

Formula: |accepted value - experimental value| \ accepted value x 100

Steps:

1. Subtract one value from another. The order does not matter if you are dropping the sign (taking the absolute value. Subtract the theoretical value from the experimental value if you are keeping negative signs. This value is your "error."

2. Divide the error by the exact or ideal value (not your experimental or measured value). This will yield a decimal number.

3. Convert the decimal number into a percentage by multiplying it by 100.

4. Add a percent or % symbol to report your percent error value.