3 MnIVO2 + KClVO3 + 6 KOH 3 K2MnVIO4 + KCl-I + 3 H2O

This is an oxidation-reduction (redox) reaction:

3 MnIV - 6 e- 3 MnVI (oxidation)

ClV + 6 e- Cl-I (reduction)

Change the oxidation states