8.58% is the change from 921 to 1000
Calculation steps:
[( 1000 - 921 ) ÷ 921] x 100 = 8.58%
Formula
Percentage change = [(1000 - 921) / 921] x 100
Subtract the new number by the original number
1000 - 921 = 79
79 ÷ 921 = 0.08577633007600434
0.08577633007600434 x 100 = 8.58%