-52.15% is the change from 721 to 345
Calculation steps:
[( 345 - 721 ) ÷ 721] x 100 = -52.15%
Formula
Percentage change = [(345 - 721) / 721] x 100
Subtract the new number by the original number
345 - 721 = -376
-376 ÷ 721 = -0.521497919556172
-0.521497919556172 x 100 = -52.15%