Bicyclist mike hall rode around the world in 91 days. what fraction in simplest form represents the part of a year, in week, he took to complete this ride?
hints: 1 week=7days; 1 year= 52 weeks

1/4

Step-by-step explanation:

The question is indirectly asking for the number of weeks he spent to complete his ride.

1 week = 7days , then

91 days = 91/7 weeks

= 13 weeks

So the fraction  in simplest form represents the part of a year, in week, he took to complete this ride will be the weeks spent / the total weeks in a year, that is

13/52

= 1/4

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: