It's not 1.2, but 32% increase, from the article-
Now that Illinois politicians have whomped us with their $5 billion, 32 percent tax increase, you can bet that more middle class taxpayers than ever are seriously considering leaving this crazy state.
Illinois income tax increase calculator: How much will it cost you?
With the help of a group of Republican lawmakers, the House overrode Gov.
Bruce Rauner's veto to pass a budget for the first time in two years. The spending plan involves a $5 billion hike in income taxes: It raises the individual rate to 4.95 percent from 3.75 percent and the corporate rate to 7 percent from 5.25 percent.
It's an increase from 3.75% to 4.95%. That is a 1.2% increase in raw percentage or 120 basis points.
It's a 32% increase like an increase from 1% to 2% would be a 100% increase or double.