Answer:
so your goal here is <u>"i want to lose 20 lbs before december."</u>
drink plenty of water and check your diet.
working out is great and all, but all the fat transmitted in your body turns into muscles, and muscles weigh more than fat.
try starting off on an easy diet and over time make it more intense, but dont starve yourself. your body needs calories.
check the calories on food boxes, and dont eat as much junk food.
most fat comes from gmo foods, or factory processed foods. its okay to have junk food every once in awhile, just not all the time.
and finally,
jump roping like 10 minutes everyday will help, all you need is to distract yourself so you dont bored eat. or, place it in your head by listening to specialized music to naturally lose weight.