-52.43% is the change from 721 to 343
Calculation steps:
[( 343 - 721 ) ÷ 721] x 100 = -52.43%
Formula
Percentage change = [(343 - 721) / 721] x 100
Subtract the new number by the original number
343 - 721 = -378
-378 ÷ 721 = -0.5242718446601942
-0.5242718446601942 x 100 = -52.43%