-42.02% is the change from 921 to 534
Calculation steps:
[( 534 - 921 ) ÷ 921] x 100 = -42.02%
Formula
Percentage change = [(534 - 921) / 921] x 100
Subtract the new number by the original number
534 - 921 = -387
-387 ÷ 921 = -0.4201954397394137
-0.4201954397394137 x 100 = -42.02%