Question

The selling price of 20 eggs is equal to the cost price of 30 eggs. Find the gain percent.​

Answer 1

SP of 20 egg= CP of 30 egg

or we can say 20SP=30CP

SP/CP= 30/20

Or SP/CP= 3/2

here, SP= 3, CP=2

Then Percentage gain = {(3-2)/2}×100

100/2 = 50%.

Answer 2

Given:

Selling price of 20 eggs = Cost price of 30 eggs

To find:

The gain percent.

Solution:

Let the cost price of 1 egg = cp

Let the selling price of 1 egg = sp

As given in the question:

20sp = 30cp

sp = 3cp/ 2

As we know that gain by one egg = (sp - cp) of one egg

= 3cp/2 - cp

= cp/ 2

Gain percent= (gain by one egg/cp of one egg) *100

= [(cp/2)/ cp] * 100

= 100/2

= 50%

Therefore the gain percent is 50%.