-29.42% is the change from 921 to 650
Calculation steps:
[( 650 - 921 ) ÷ 921] x 100 = -29.42%
Formula
Percentage change = [(650 - 921) / 921] x 100
Subtract the new number by the original number
650 - 921 = -271
-271 ÷ 921 = -0.2942453854505972
-0.2942453854505972 x 100 = -29.42%