-62.76% is the change from 921 to 343
Calculation steps:
[( 343 - 921 ) ÷ 921] x 100 = -62.76%
Formula
Percentage change = [(343 - 921) / 921] x 100
Subtract the new number by the original number
343 - 921 = -578
-578 ÷ 921 = -0.6275787187839305
-0.6275787187839305 x 100 = -62.76%