What would happen if currency in all countries had fewer denominations

I believe the answer is: "People could not charge as many different prices for good

Denominations refers to the face value of our currency. (for example $1 , $ 10 , $ 100). As a country enter industrialisation era, even the smallest denomination matters in determining the profit of companies who mass produce a certain type of goods. Which is why possibility of many denominations is important for trades.