Question

By installing a solar energy device, rahul electricity bill reduce from ruppes 9000 every month to ruppes 7800 a month. What was the percentage decreased in the bill amount

Answer 1

Percentage decrease in bill amount = 13.33%

Step-by-step explanation:

Amount of bill before installation= Rs.9000

Amount of bill after installation=Rs.7800

Decrease in Amount of bill = Rs.9000-Rs.7800

                                            = Rs.1200

Percentage decrease in bill amount = $\frac{1200}{9000}\times 100$

                                                           = 13.33%

Answer 2

Percentage decrease in bill amount = 13.33%

Step-by-step explanation:

Amount of bill before installation= Rs.9000

Amount of bill after installation=Rs.7800

Decrease in Amount of bill = Rs.9000-Rs.7800

= Rs.1200

Percentage decrease in bill amount = \frac{1200}{9000}\times 100

9000

1200

×100

= 13.33%