Question

A boy buy 100 pen in 160 rupees.so,how many pen in 400 rupees?

Answer 1

Here is your answer

In 160 rs....100 pen
1 rs....100/160
400rs....100×400/160
=250 pen

Hope it helps

Answer 2

100 pens = 160 rupees
? = 400 rupees

400×100/160
40,000/160
250

He buy 250 pens.

It may help you..☺☺