Power Automate (WDL) function

decimal — Power Automate (WDL) function reference

Exact decimal value.

Syntax

wdl

decimal(value)

wdl

decimal('19.99')

→ A decimal

wdl

mul(decimal(item()?['UnitPrice']), decimal(item()?['Quantity']))

→ An exact decimal line total

decimal() compares by value, not by the original string representation.

wdl

equals(decimal('10.00'), decimal('10.0'))

→ true

Prefer decimal over float for money to avoid rounding drift.
decimal() supports up to 28-29 significant digits (it maps to .NET's decimal type), making it the right choice for currency math over float().
Mixing a decimal() value with a plain float literal in the same arithmetic call can silently fall back to floating-point behavior rather than staying exact — keep both operands decimal().

From Type conversion