Question

At 9 AM, a bird bath contained 7/8 gallon of water. Each hour, 1/16 gallon evaporated. What time was it when 1/4 gallon remained

Answer 1

it was 7pm when there was only 1/4gallons left

Answer 2

the time would be 7pm because if you multiply 7/8 by 2 it would equal 14/16 then you can add hours and subtract one 1/16 at a time until you have 4/16 aka 1/4