medium · GMAT Quant
A tax professional can audit a file in 4 hours, while a software-assisted tool can audit the same file in 2 hours.
If the professional starts auditing a file and works for 1 hour before the software tool is activated to help finish the job, what total fraction of the audit was performed by the software tool?
- dfrac12
- dfrac23
- dfrac34
- dfrac13
- dfrac14
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