Paul earned

Paul earned 300 CZK in one hour, Václav 1/3 more than Paul. Václav worked 60 hours, which is 1/3 fewer hours than Paul worked. How much percent less did Paul an hour than Václav? How many hours did Paul more than Václav? How much did Paul earn more than Václav?

Correct answer:

a =  25 %
b =  30 h
c =  12.5 %

Step-by-step explanation:

p=300 Kc/h v=p+p/3=300+300/3=400 Kc/h  h2​=60 h h2​ = h1​−h1​/3 h1​=h2​/(1−31​)=60/(1−31​)=90 h  a=100⋅ vv−p​=100⋅ 400400−300​=25%
b=h1​−h2​=90−60=30 h
z1​=p⋅ h1​=300⋅ 90=27000 Kc z2​=v⋅ h2​=400⋅ 60=24000 Kc  c=100⋅ z2​z1​−z2​​=100⋅ 2400027000−24000​=225​%=12.5%

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