A vendor sells his goods using weights 19% less than true weights and makes a profit of 35% on costs. His net gain percentage (rounded off to 2 decimal places) is:

A company considers hiring an extra machine for $150 per day to produce additional units. If the additional throughput contribution generated from producing these units on the machine is $390, by how much will total profit increase?

If the cost price of an article is 85 times its selling price, what is the loss percentage?