What percentage is the minimum a father will be required to pay for support?

Ok if you are getting $1,100 a month in child support for one kid, you are very well off.

Here's some calculators: http://www.alllaw.com/calculators/childsupport/

If the court set the amount at 2,200 a month for both children then it is appropriate that with only one child you should be getting 1,100 a month. You will have to go to the court and provide some numbers.

Here's an example of how such calculations might work in the state of Anywhere, USA:

Mark's income as a bank manager is $90,000. Nancy's income as a paralegal is $50,000. Their combined income is $140,000. For the purposes of child support, their child is entitled to 20 percent of the combined parental income, up to $70,000 in their state. The child support is to be paid in the ratio of the parents' incomes to their combined income. Because the combined income is double the amount used for the purposes of the base calculation—$140,000—the law in their state allows the judge to decide how to use the extra $70,000 of income. The judge decides to cap the income to be considered for support at $110,000. He then calculates that 20 percent of $110,000 is $22,000—the total amount of child support. Nancy has to pay 36 percent of this amount, or $7,920, and Mark has to pay 64 percent, or $14,080.

I believe it is 20% of the fathers income only, he will get credit for visitation but it will not effect the numbers that much. The 7% can definitly be increased if you are the only residential parent, but since you are not the $1,100 will probably be deemed sufficiant. A lawyer could definitly appeal a 7% payment but it would be risky to ask for more considering the numbers involved and the fact that he is residential parent of one child already.