Question

find the ratio of the price of coffee to that of tea if coffee costs $120 per 100g and tea costs $160 per kg

Answer 1

This is the required answer.
Hope this helps you.

Answer 2

Coffee  = $120 /100 g  which is $1200 per kg
Tea      =  $160 kg

Ratio of Coffee is to Tea = 1200/160 = 15/2 i.e 15: 2