-64.29% is the change from 966 to 345
Calculation steps:
[( 345 - 966 ) ÷ 966] x 100 = -64.29%
Formula
Percentage change = [(345 - 966) / 966] x 100
Subtract the new number by the original number
345 - 966 = -621
-621 ÷ 966 = -0.6428571428571429
-0.6428571428571429 x 100 = -64.29%