Enter the change in RPI (%) and the original ground rent ($) into the calculator to determine the RPI New Ground Rent. ## RPI New Ground Rent Formula The following formula is used to calculate the RPI New Ground Rent. NGR = RPI / 100 * OGR + OGR • Where NGR is the RPI New Ground Rent ($)
• RPI is the change in RPI (%)
• OGR is the original ground rent ($) To calculate the RPI ground rent, multiply the change in RPI by the original ground rent, then add the original ground rent to the result. ## How to Calculate RPI New Ground Rent? The following example problems outline how to calculate RPI New Ground Rent. Example Problem #1: 1. First, determine the change in RPI (%). In this example, the change in RPI (%) is given as 10. 2. Next, determine the original ground rent ($). For this problem, the original ground rent ($) is given as 1000. 3. Finally, calculate the RPI New Ground Rent using the equation above: NGR = RPI / 100 * OGR + OGR The values given above are inserted into the equation below: NGR = 10 / 100 * 1000 + 1000 = 1100($)

Example Problem #2:

The variables needed for this problem are provided below:

change in RPI (%) = 15

original ground rent ($) = 1500 Entering these values and solving gives: NGR = 15 / 100 * 1500 + 1500 = 1725($)