Question

aman purchase 12 pens for rupees 156and pay us buy 9 pens for rupees 108 who got cheaper pen in ratio and portion

Answer 1

for 12 pens the money paid is 156

so for each pen cost is 13

in case 2

for 9 pens the money paid is 108

so for each pen cost is 12

cost in case 1>cost in case 2

so in case 2 pen is cheap

Answer 2

Therefore, Payush got the pens cheaper