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`CI = ( "RI" - "BI" )/( "BI" )`

Enter a value for all fields

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

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

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

**Percent Change in Income(CI):** 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 Income is:

CI = (RI - BI) / BI

where:

- CI is the Percent Change in Income
- BI is the base or previous income
- RI is the revised, new or current income