# Percentage Type with Decimal [](https://github.com/fMeow/decimal-percentage-rs/actions) [](./LICENSE) [](https://crates.io/crates/decimal-percentage) [](https://docs.rs/decimal-percentage) A type to represent percentage with high precision thanks to `rust_decimal`. A percentage can perform addition, subtraction and multiplication. ```rust use decimal_percentage::Percentage; use rust_decimal::Decimal; let p1 = Percentage::from(0.1f64); let p2 = Percentage::from(0.1f32); let p3 = Percentage::try_from("0.1").unwrap(); let p4 = Percentage::from(Decimal::from_f64(0.3).unwrap()); assert_eq!(p1 + p2, Percentage::from(0.2)); assert_eq!(p1 + 0.2, Percentage::from(0.3)); assert_eq!(p4 - p2, Percentage::from(0.2)); assert_eq!(p1 * 66.0, 6.6); assert_eq!(p1 * 100u32, 10u32); assert_eq!(p1 * -100i32, -10i32); // note that a multiplication to integer type can lose precision assert_eq!(p1 * -33i32, -3i32); // multiplication on extremely small value with Decimal, // that is not representable with float point let small_value = Decimal::from_str("0.0000000000000000002").unwrap(); assert_eq!(p1 * small_value, Decimal::from_str("0.00000000000000000002").unwrap()); ``` ## Contributing Contributions and feed back are welcome following Github workflow. ## License `decimal_percentage` is provided under the MIT license. See [LICENSE](./LICENSE).