| Nominative | perć |
| Genitive | perci |
| Dative | perci |
| Accusative | perć |
| Instrumental | percią |
| Locative | perci |
| Vocative | perci |
| Nominative | perci; percie |
| Genitive | perci |
| Dative | perciom |
| Accusative | perci; percie |
| Instrumental | perciami |
| Locative | perciach |
| Vocative | perci; percie |