Original sentence: -  6%  73%  IRS.During World War I, the top rate rose to 77% and the income threshold to be in this top bracket increased to $1,000,000 ($16 million 2007 dollars); after the war, the top rate was scaled down to a low of 25% and the income threshold for paying this rate fell to a low of $100,000 ($1 million 2007 dollars)
Edited sentence: -  6%  77%  IRS.During World War I, the top rate rose to 77% and the income threshold to be in this top bracket increased to $1,000,000 ($16 million 2007 dollars); after the war, the top rate was scaled down to a low of 24% and the income threshold for paying this rate fell to a low of $100,000 ($1 million 2007 dollars)