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`CP = ( RP - BP )/( BP )`

Enter a value for all fields

The **Percent Change in Price **calculator computes the percentage change in price based on base price and a revised price.

**INSTRUCTIONS**: Choose units and enter the following:

- (
**BI**) This is the base or previous price - (
**RI**) This is the revised or new price

**Percent Change in Price (CP):** The change is returned as a percentage. However, this can be converted to a real number via the pull-down menu.

- Midpoint Method for Price Elasticity of Demand
- Income Elasticity of Demand
- Simple Price Elasticity of Demand

The formula for Percent Change in Price is:

CP = (RP - BP) / BP

where:

- CP is the Percent Change in Price
- BP is the base or previous price
- RP is the revised, new or current price