Guide me in how many months i can reduce my weight?

I am 28yrs , height 5.8inchs and weight 83kgs. I want to reduce 10kgs. Since last 3weeks i am doing excersise like walking in threadmill at incline position of 6 at a speed of 5.5mph for 30minutes,stepper for 30minutes and cycling for 20 minutes and some anerobic excersise. guide me if continue this excersie in how many months i can acheive my target. I want to reduce my belly too. My food content is morning 2bread , afternoon little rice with vegies and night litle rice with vegies.