How many calories do I have to eat to go from 160 to 140 in 45 days?

Question

I walk a brisk 1 mile every other day and on the opposite days i work out on my ab lounger for 20 mins

Answer 1

3,500 calories makes one pound

Walking 3 miles burns about 200 calories.

You lose weight when you burn more calories than you eat.

No one can answer you question. Each person's metabolism is different.