How many electrons and protons are present in the balanced half equation? `NO_(2)^(-)rarrNO`

Explanation

`overset(+3)(NO_(2)^(-)) to overset(+2)(NO)`
`NO_(2)^(-)+2H^(+) to NO+H_(2)O`
`NO_(2)^(-)+2H^(+)+e^(-) to NO+H_(2)O`
Number of electrons =1
Number of protons =2