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On Mars a day is called a sol. Mars has a 668-sol year with a 7-sol week. If a regular Martian year has 95 weeks, and a leap year is one week longer, what fraction of the years are leap years? Express your answer as a common fraction.

 Nov 22, 2018
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668/7 = 95.4285714285714286    Number of weeks in a Sol-year

     the  decimal portion will be part of the sol week

         0.4285714285714286 x 7 = 3.0000000000000002 days

                 every 7 years would be 21 days or 3 weeks

                        so in 7 years they would need 3 Leap Years   

                        3/7

 Nov 22, 2018

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