A portable battery charger can fully charge a smartphone in 26 minutes or a tablet in 53 minutes. Ana charged her tablet fully and her phone halfway. How many minutes did it take? Let's be accurate as possible.
user
Ana charged her phone halfway, so she took 26 / 2 = 13 minutes to charge her phone. Thus, it took Ana 13 + 53 = 66 minutes to charge her phone and tablet.
The answer: 66.
assistant