Wisconsin does not have any laws specifying how much notice a landlord must give you in order to raise your rent. Your original lease should specify how much advance notice will be given.
On a month to month lease, the landlord is required to give a minimum of 28 days notice, the same as beginning eviction proceedings. If your current lease is still valid, the landlord cannot legally change the rent until the lease ends.
Yes. Your income is unrelated to your rent.
Increase
It is a percentage increase
Increase
17,350/10,500 = 1.652381... = 65.24% greater (rounded)
I work it out as:100 increased by 17% is 117100 increased by 15% is 115117 is 2 greater than 115 = 2/115 * 100 = a 1.739% (3 decimal places only) increase. We could say that it is roughly 1.01739 times as big if this is what you mean.
Inflation
An increase of more than 100% means the original value is increased by more than double.
An 800 percent increase.
0.75 percent is greater.
Three percent is greater.
0.24 percent is the greater.