Percentage field format

Hi,

I'm new to livecycle designer and I need your valuable help!

I'm making a form and I need to have some percentage fields, with data entered by filling the form.

These percentage fields should have format 000%. Ex. 005%, 035%, 100%

There should be an error message when the user tries to input a num greater than 100,

Also, I don't know if it could be done, to have a calculator script that summarizes all the input data and verify that the summary is aways 100. Ex. if field1 input=50, field2 input=30, field3 input=20, field4 input=0, field5 input=0, then it's ok!