let see
1/5 is deport
1/2 * 4/5 is work
1/2*4/5 is free time
a)cuantos dias del año hace deporte
deport = 1/5 of 365
then deport = 365/5 = 73 days of year
b)cuantos dias del año descansa
free time = 1/2*4/5*365
then free time = (1*4*365)/(2*5)= 1460/10 = 146 days of year