Assuming the cost of the store in 2016 to be 100 and the profit percentage that year to be 100, the revenue for the store in that year would be 200.
Therefore, in 2017, with a revenue of 400 and given that 30% of the revenue is equivalent to 40% of the cost, the cost for the store in 2017 is calculated as follows:
Cost in 2017=4030×Revenue in 2017=4030×400=300.
Cost in 2017=3040×Revenue in 2017=3040×400=300.
In 2018, with a cost of 200, and given that 50% of the cost is equivalent to 40% of the revenue, the revenue for the store in 2018 is calculated as follows:
Revenue in 2018=10040×Cost in 2018=10040×200=500.
Revenue in 2018=40100×Cost in 2018=40100×200=500.
So, the values for revenue and cost for the different years are as follows:
Percentage profit of the store in 2018 = \(\frac{50}{200}=25\%\)
Assuming the cost of the store in 2016 to be 100 and the profit percentage that year to be 100, the revenue for the store in that year would be 200.
Therefore, in 2017, with a revenue of 400 and given that 30% of the revenue is equivalent to 40% of the cost, the cost for the store in 2017 is calculated as follows:
Cost in 2017=4030×Revenue in 2017=4030×400=300.
Cost in 2017=3040×Revenue in 2017=3040×400=300.
In 2018, with a cost of 200, and given that 50% of the cost is equivalent to 40% of the revenue, the revenue for the store in 2018 is calculated as follows:
Revenue in 2018=10040×Cost in 2018=10040×200=500.
Revenue in 2018=40100×Cost in 2018=40100×200=500.
So, the values for revenue and cost for the different years are as follows:
The ratio of the revenues =16:100 = 8:5.
Assuming the cost of the store in 2016 to be 100 and the profit percentage that year to be 100, the revenue for the store in that year would be 200.
Therefore, in 2017, with a revenue of 400 and given that 30% of the revenue is equivalent to 40% of the cost, the cost for the store in 2017 is calculated as follows:
Cost in 2017=4030×Revenue in 2017=4030×400=300.
Cost in 2017=3040×Revenue in 2017=3040×400=300.
In 2018, with a cost of 200, and given that 50% of the cost is equivalent to 40% of the revenue, the revenue for the store in 2018 is calculated as follows:
Revenue in 2018=10040×Cost in 2018=10040×200=500.
Revenue in 2018=40100×Cost in 2018=40100×200=500.
So, the values for revenue and cost for the different years are as follows:
The profit of the store from the Electronics department in 2016 is calculated as 100 - 30 = 70.
The total profit is given as 100.
The required percentage, representing the proportion of the total profit contributed by the Electronics department in 2016, is calculated as follows:
Required Percentage = \(\frac{Profit\ from\ Electronics\ in\ 2016}{Total\ profit}\times100\)
\(=\frac{70}{100}\times100=70\%\)
Therefore, the Electronics department contributed 70% of the total profit in 2016.
Assuming the cost of the store in 2016 to be 100 and the profit percentage that year to be 100, the revenue for the store in that year would be 200.
Therefore, in 2017, with a revenue of 400 and given that 30% of the revenue is equivalent to 40% of the cost, the cost for the store in 2017 is calculated as follows:
Cost in 2017=4030×Revenue in 2017=4030×400=300.
Cost in 2017=3040×Revenue in 2017=3040×400=300.
In 2018, with a cost of 200, and given that 50% of the cost is equivalent to 40% of the revenue, the revenue for the store in 2018 is calculated as follows:
Revenue in 2018=10040×Cost in 2018=10040×200=500.
Revenue in 2018=40100×Cost in 2018=40100×200=500.
So, the values for revenue and cost for the different years are as follows:
The profit percentage of the store in 2017 is calculated as \(\frac{100}{300}×100=33.3\%\)
Similarly, the profit percentage of the store in 2018 is calculated as \(\frac{50}{200}×100=25.0\%\)
The required difference between the two profit percentages is \(33.3\%−25.0\%=8.3\%.\)