Wonderlic Cognitive Ability Practice Test

What could be a possible estimation method for calculating 0.75 of John's salary?

1. Multiplying by 0.50

2. Estimating to 0.80

3. Rounding to 0.70

4. Subtracting 0.75 from the total

The correct answer is: Rounding to 0.70

To find a suitable estimation method for calculating 0.75 of John's salary, rounding to 0.70 is a reasonable approach. This method simplifies the calculation by adjusting the figure to a nearby, manageable number. By rounding down to 0.70, one may quickly estimate that 0.75 is slightly higher than 0.70, hence it provides a close approximation for quick mental calculations. For instance, if John's salary is $100, calculating 0.70 would give $70, while a more precise 0.75 would be $75. This rounded estimation can be useful in contexts where speed and simplicity are valued over precision. Other methods, such as multiplying by 0.50, would yield only half of the salary, which is not related to the estimation of 0.75. Estimating to 0.80 would be too high, resulting in an overestimation. Lastly, subtracting 0.75 from the total does not yield a meaningful representation of John's salary at 0.75; it rather indicates what is left after taking away 0.75, which is not what the question seeks. These alternatives do not effectively serve the estimation goal as well as rounding to 0.70