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# perc
A simple vibe-coded command-line percentage calculator written in Go.
## Installation
```bash
go install codeberg.org/snonux/perc/cmd/perc@latest
```
Or using mage:
```bash
mage install
```
## Usage
`perc` supports various percentage calculation formats:
### Calculate X% of Y
```bash
perc 20% of 150
# Output:
# 20.00% of 150.00 = 30.00
# Steps: (20.00 / 100) * 150.00 = 0.20 * 150.00 = 30.00
perc what is 20% of 150
# Output:
# 20.00% of 150.00 = 30.00
# Steps: (20.00 / 100) * 150.00 = 0.20 * 150.00 = 30.00
```
### Find what percentage X is of Y
```bash
perc 30 is what % of 150
# Output:
# 30.00 is 20.00% of 150.00
# Steps: (30.00 / 150.00) * 100 = 0.20 * 100 = 20.00%
```
### Find the whole when X is Y% of it
```bash
perc 30 is 20% of what
# Output:
# 30.00 is 20.00% of 150.00
# Steps: (30.00 / 20.00) * 100 = 1.50 * 100 = 150.00
```
## Building
Using mage:
```bash
mage build
```
Or using go directly:
```bash
go build -o perc ./cmd/perc
```
## Testing
```bash
mage test
```
## License
See LICENSE file for details.
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