Question

find that the sum of spend in 10 %​

Answer 1

Answer:

Don't believe me, here's a simple example:

Consider you have ₹($)100 and spend ₹($)1 100 times:

Spent Balance

*o 100

*1 99

*1 98

*. .

*. .

*. .

*1 1

*1 0)

--------------------------[Sum]

100 99 + 98 + 97...+ 1 = 99*50 = 4950

And well, of course 100 doesn't equal to 4950...

Before you go all confused about your own logics, let me validate a thing for you, the relationship between the amount of money you spend and your balance:

Amt. of money spent = initial balance - final balance