A shopkeeper purchases supplies from a supplier. The supplier sells 750 units of bags to the shopkeeper after gaining the sale price of 125 units of bags. What is the gain percentage of the supplier?

Let the selling price (SP) of 1 unit of bag be $1.Then,thesellingpriceof750unitsofbagsis:SP=$ 750
The gain is equal to the selling price of 125 units of bags:

Gain=$125Weknowthat:CostPrice(CP)=SP-GainCP=750-125=$ 625
Now, calculate the gain percentage:

Gain Percentage=(
CP
Gain
​
)×100
Gain Percentage=(
625
125
​
)×100=
5
1
​
×100=20%