The marked price of a hot water geyser is $₹9000.$ It is available at a discounted price for $₹7560$ on an online shopping website. 

What is the percent reduction in the cost of the geyser?

Misha spent $₹15,000$ for groceries and home products last month. She shopped online as well as from the local market. The amount of money she spent on online shopping is three times the amount she spent on shopping from the local market.

What percentage of money did Misha spend by shopping online?

Nisha purchased $20$pairs of earrings for $₹200$. She pasted colourful beads on the earrings with glue. The beads cost her $₹30$ and a tube of glue to stick the beads costs $₹20.$

She sold each pair of earrings for $₹40$.

After selling all the earrings, how many rupees did she make as profit?

Nisha purchased $20$pairs of earrings for $₹200$. She pasted colourful beads on the earrings with glue. The beads cost her $₹30$ and a tube of glue to stick the beads costs $₹20.$

She sold each pair of earrings for $₹40$.

What percentage profit did Nisha make?