Mr.Tandon purchased a computer for ₹ 32,000 and a microwave oven for ₹ 6,500. On computer he lost 5% and on microwave he gained 15%. Find his total gain or loss per cent.(7th class math)

Mr.Tandon purchased a computer for ₹ 32,000 and a microwave oven for ₹ 6,500. On computer he lost 5% and on microwave he gained 15%. Find his total gain or loss per cent.(7th class math)

Solution:Given Cost price(C P) of Computer = Rs.32000

                                                           Loss % = 5%

                         Cost price(C P) of Oven = Rs.6500

                                                     Gain % = 15%

(1)Computer:

Loss (Computer) Rs. = 5 % of 32000

                                  = 5/100 X 32000

                                  = Rs.1600

then Selling price of Computer = (32000 - 1600)Rs.

                                                   = Rs.30400

(2)Oven:

Gain(Oven) Rs. = 15% of 6500

                          = 15/100 X 6500

                          = Rs.975

then Selling price of Oven = (6500 + 975) Rs.

                                           = Rs.7475

Total C P of (computer + oven) = Rs.32000 + Rs.6500

                                                   = Rs.38500

Total S P of (computer + oven) = Rs.30400 + Rs.7475

                                                   = Rs.37875

S P < C P ,then there is a loss.

Loss% = (C P - S P)/C P X 100

            = (38500 - 37875)/38500 X 100

            = 625/38500 X 100

            = 625/385

            = 1.62%

Therefore Loss 1.62%.