# Issue

I was playing with datatypes in python.

Every time, when I do

`remaining_amount = .1 + .1 + .1 - .3`

python gives an exponential result.

I try to do the same with c#

`double remainingAmount = .1 + .1 + .1 - .3`

It is also giving result in exponential form.

In both cases, the result is **5.55111512312578E-17**

But in **c#**, when I **change double to decimal, the result is 0.0**

I am unable to understand why this is happening in both languages. And how can I fix this in python?

# Solution

@Netwave is correct, as you wanted to fix this in python, the way would be `decimal`

module:

```
>>> from decimal import Decimal
>>> Decimal('.1') + Decimal('.1') + Decimal('.1') - Decimal('.3')
Decimal('0.0')
>>> float(Decimal('.1') + Decimal('.1') + Decimal('.1') - Decimal('.3'))
0.0
>>>
```

Answered By - U12-Forward Answer Checked By - Marie Seifert (PHPFixing Admin)

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