-7.6% is the change from 921 to 851
Calculation steps:
[( 851 - 921 ) ÷ 921] x 100 = -7.6%
Formula
Percentage change = [(851 - 921) / 921] x 100
Subtract the new number by the original number
851 - 921 = -70
-70 ÷ 921 = -0.07600434310532031
-0.07600434310532031 x 100 = -7.6%