Explanation:
❅

- CP of 11 pencils = SP of 10 pencils
❅

- Gain percent or loss percent
✻



{ Since CP of 15 articles is equal to SP of 12 )

Here , SP > CP. So, He / she made a profit.

⟿

⟿

⟿

Now , Finding the profit percentage :

⟿

⟿

⟿

⟿

⟿


Hope I helped ! ♡
Have a wonderful day / night ツ
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁