My toilet burps whenever I flush it. Bubbles pop up and then it empties. How cann I fix this?

I tried changing it's angle and it didn't work. It is gross.My toilet burps whenever I flush it. Bubbles pop up and then it empties. How cann I fix this?
Probably needs a new seal (at the base of the toilet)

or could be air in the system.
call a plumberMy toilet burps whenever I flush it. Bubbles pop up and then it empties. How cann I fix this?
What you have described sounds like the vent stack is clogged. The burping is caused as the water creates a vacuum in the pipe. Once the pressure outside the toilet becomes greater than that in the pipe, air moves past the water in the bowl making the sound as it does. Since the water is not traveling through the waste line as it should, you risk a clog in the line if you don't take care of it soon.
There may be a Vent pipe that goes through the Roof, you can check it up top and see if it is obstructed. Then all I know is something in the Drain line. You can buy a hand Rooter that may be cheaper than a plumber IF it long enough and works, may have to Remove the Toilet to use it easily.My toilet burps whenever I flush it. Bubbles pop up and then it empties. How cann I fix this?
simple. get a plumber.
Try plunging it. Something is in there that dont need to be. If you can't get it with a plunger, try a toilet auger. And as a last resort, pull the toilet and fish a coat hanger through the bottom.
Call a plumber