A country used to have a tax rate of 20%.  They raised it to 30%.  In that same time frame, John went from making 1,000,000 a year to 1,500,000 a year.  How much more does he pay in taxes now compared to then?
At 20% he paid .2*1000000=$<<.2*1000000=200000>>200,000
Now he pays 1500000*.3=$<<1500000*.3=450000>>450,000
So he pays an extra 450000-200000=$<<450000-200000=250000>>250000
#### 250000