Examples:
10 > 10
5.1 > 5.09999990463256
10.1 > 10.100000381469727
20.1 > 20.100000381469727
17.6 > 17.600000381469727
20.3 > 20.299999237060547
8.4 > 8.399999618530273
5.3 > 5.30000019073486
207.97 > 207.97000122070312
Examples:
10 > 10
5.1 > 5.09999990463256
10.1 > 10.100000381469727
20.1 > 20.100000381469727
17.6 > 17.600000381469727
20.3 > 20.299999237060547
8.4 > 8.399999618530273
5.3 > 5.30000019073486
207.97 > 207.97000122070312
You can use an AttributeRounder to fix that.
You can use @round in the Arithmatic Editor:
@round(@CurrentAttribute(),5)