Product Constancy

Today, we are going to discuss product constancy. It is one the important topics in percentage section. It is also one of the basic topics you need to prepare for the percentage. In the section below we will solve examples on consumption, and heights. Let us see!

What is Product Constancy?

Product constancy means the consistency of the product even though there is an increase or decrease in its price. You can also call product constancy as inverse proportionality. In product constancy, you have to reduce the consumption when there is an increase in price so that your budget remains the same.

Suppose you have a situation where the price of a product has risen by 25%. But you need to keep your total expenditure constant. So, what would you do? You will try and manage the only thing that is in your hand i.e. consumption. You can reduce the consumption accordingly so that whatever there is an increase in price, the total expenditure will remain same. Here as mentioned, the price of the product is increased by 25% so what should be the decrease in consumption to meet your expenses?

Here, in this question suppose that earlier the price of the product was Rs. 100. Now with the increase in price, it becomes Rs. 125. So now for Rs. 100 the 80% of the same product will be available. So, you will get 80% of the product for Rs. 100 wherein earlier you used to get whole 100%. So, this is a difference of 20%. Thus you need to reduce your consumption by 20% so that your total expenditure will remain the same.

Here below is the product constancy table which denotes the increase and decreases in ratio and the percentage so that your total expenditure will be same. You can remember some of the values of this table so that the questions related to product constancy will become easier for you.

Product AB is constant	A increases( in %)	B decreases (in %)
Value 1	9.09	8.33
Value 2	10	9.09
Value 3	11.11	10
Value 4	12.5	11.11
Value 5	14.28	12.5
Value 6	16.66	14.28
Value 7	20	20
Value 8	25	20
Value 9	33.33	25
Value 10	50	33.33
Value 11	60	37.5
Value 12	66.66	40
Value 13	75	42.85
Value 14	100	50