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37 percentage

Step-by-step explanation:

cost price of 6 oranges = rs 20

cost price of 1 orange = rs 20/6

sold price or selling price of 4 oranges = rs 18

sold price of 1 orange = rs18/4

you can see that there is a profit,

so profit = P = selling price - cost price

= rs18/4-20/6

= 7/6

profit% or u can say gain%= profit/cost price ×100 ( it is a formula )

= 7/6/20/6×100

= 7×6/20×7×100

= 35% is the profit or gain %

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Answer:

Given,

C.P of 6 oranges =Rs.20

C.P of 1 orange = 20/6 =Rs.3.333

S.P of 4 oranges =Rs.18

S.P of 1 orange = 18/4 =Rs.4.5

Here, S.P is greater than C.P, so its gain

Therefore,

Gain = S.P−C.P /CP ×100

or, Gain = 4.5−3.33/3.33 ×100

or, Gain = 1.17/3.33×100

or, Gain =35.135%

Therefore this answer was proved

I hope it's help you