Question

A shopkeeper bought 21 chairs at the rate of rupees 450 per chair he sold 16 of them at the rate of rupees 600 per chair and the remaining at the rate of rupees 400 per chair find his gain or loss percent.

Answer 1

CP of 21 Chairs = 21×450=$9450
SP of 16 chair = 16×600=$9600
SP of 5 chairs = 5×400=$2000
Total SP is $11600
G%= 11600-9450/9450×100
=2150/9450 ×100=22.75%

Answer 2

HEYY....
SOLUTION IS DONE.

total amout of Purchasing = 450×21 = 9450₹
amount of 16 chairs selling = 600×16 = 9600₹
and amount of remaining 5 chairs selling = 400×5 = 2000
amount of total chairs selling = 9600+2000 = 11600₹
His gain = SP-CP = 11600-9450 = 2150₹
PROFIT PERCENT = 2150×100/11600 = 18.53%

I THINK THIS IS THE RIGHT ANSWER.
THANKYOU BUDDY.