Installed plugins: (3)

EssentialsX-2.18.2.0
PlaceholderAPI-2.10.10-DEV-110
Vault-1.7.3

Environment:

Spigot 1.8.8

Description:

When you set yourself the amount "0.001" of money, it will display as "9.999999999999998E-4" when you parse the placeholder %vault_eco_balance%. Though the amount of money displays well when slashing "/money [name]".
https://i.imgur.com/eOBbhDS.png

How to reproduce:

1- Download Vault's PlaceholderAPI expansion.
2- Set your balance exactly to "0.001", with /eco set [Yourname] 0.001
3- Slash "/papi parse me %vault_eco_balance%"

This isn't a Vault issue. Placeholder isn't vault. Vault doesn't support commands to set balances, and it doesn't do any translation of data.

Thank you!