I want to divide a given dollar amount into 3 parts based on the weightage shown below.
amount = 2220
multiply = [0.6217, 0.1621, 0.2162] # sums up to 1
part_a = amount * multiply[0] # 1380.174
part_b = amount * multiply[1] # 479.964
part_c = amount * multiply[2] # 359.86199999999997
total = part_a + part_b + part_c
print(total) # 2220.0
The sum of part_a, part_b, part_c adds up to 2220. However, the issue arises when I tried to round it up into 2 decmial place.
part_a = round(amount * multiply[0], 2) # 1380.17
part_b = round(amount * multiply[1], 2) # 479.96
part_c = round(amount * multiply[2], 2) # 359.86
total = part_a + part_b + part_c
print(total) # 2219.9900000000002
Why is it that the individual value for part_a, part_b, part_c is in 2 decimal place but the total becomes 2219.9900000000002?
What would be the best way to calculate the results such that the part a, b, and c would be in 2 decimal places and the summation of different parts would add up to the initial amount which is 2200?
