It depends on how you calculate 25% more but the percentage always changes depending on the dollar amount however you calculate it.

For example, if you start with Jane's amount, say $1000, then 25% more of that would make John's amount $1250. However, if you start with John's amount, say it's the same $1250, then 25% LESS of that would make Jane's amount $937.50.

Starting with John's inheritance at $1000, then Jane's would be $750, totaling $1750. To make it even, John must give Jane $125 so that they both end up with half of the total, or $875. In this case, $125 = 12.5%.

However, if you start with Jane's inheritance at $1000, then 25% more would make John's $1250 and he'd have to give her 12.5% to make it even. Starting with Jane's inheritance at $800, then 25% more would be $1000. In this case, John would have to give Jane $100 or 10% to make it even.

So, no matter how you calculate, the percentage changes depending on the dollar amount.