Janice walks a total of 7/8 hour. She walks at a rate of 1 mile every 1/4 hour. How many miles did she walk?
? miles
To find the number of miles Janice walked, we need to multiply her rate by the total time she walked.
Her rate is 1 mile every 1/4 hour, so she walks 1/(1/4) = 1*4/1 = <<1/(1/4)=4>>4 miles every hour.
Since she walked for 7/8 hour, she walked a total of 4*7/8 = <<4*7/8=3.5>>3.5 miles. Answer: \boxed{3.5}.