Q:
# Can percent error be a negative number?

**Percent error can be a negative number.** In some cases a positive percent error is typical, but applications such as chemistry frequently involve negative percent errors.

Credit:
Fuse
N/A
Getty Images

Percent error is useful in experiments and calculations involving known values; it provides a means of ascertaining the accuracy of calculations. Determining percent error is simple; subtracting the actual value from the experimental value, dividing by the actual value and multiplying the entire product by 100 yields percent error.

A percent error of zero indicates that an experimental value is exactly the same as the actual, accepted value. Percent errors are often positive with the difference between experimental and actual results being an absolute value. This is the case when it is important to determine error, but the direction of the error makes no difference. In some situations, however, the direction of the deviation is important.

Chemistry, and some other sciences, maintain negative percent error values. For instance, a given reaction between two substances may have a previously published final yield. It is important for any scientists performing this reaction to report on its accuracy. It is also important to know the direction of the error. A positive percent error means that the reaction had a higher-than-expected yield while a negative error indicates a lower yield.

Learn more about Numbers-
Q:
## How do you find factors of a number?

A: Factors are the numbers that are multiplied together to get another number. To find the factors of a given number, the number is divided by other numbers s... Full Answer >Filed Under: -
Q:
## How do you spell the number 90?

A: The number 90 is spelled "ninety." It is formed from its base of nine followed by a -ty which signifies that the number is followed by a tens placeholder.... Full Answer >Filed Under: -
Q:
## Is 51 a prime number?

A: The number 51 is not a prime number; it is a composite number. A prime number is any positive number that can be divided evenly only by the number 1 and it... Full Answer >Filed Under: -
Q:
## What is a prime number in math?

A: A prime number in math is an integer greater than 1 that is evenly divisible by only 1 and the number itself. One is not considered a prime number, because... Full Answer >Filed Under: