pub fn format_rate4(value: i64) -> StringExpand description
Format a PIS/COFINS rate stored as value × 10 000 to a 4-decimal string.
For example, 16500 (= 1.65%) → "1.6500".
§Examples
use fiscal_core::format_utils::format_rate4;
assert_eq!(format_rate4(16500), "1.6500");