-17.05% is the change from 921 to 764
Calculation steps:
[( 764 - 921 ) ÷ 921] x 100 = -17.05%
Formula
Percentage change = [(764 - 921) / 921] x 100
Subtract the new number by the original number
764 - 921 = -157
-157 ÷ 921 = -0.17046688382193267
-0.17046688382193267 x 100 = -17.05%