-2.12% is the change from 848 to 830
Calculation steps:
[( 830 - 848 ) ÷ 848] x 100 = -2.12%
Formula
Percentage change = [(830 - 848) / 848] x 100
Subtract the new number by the original number
830 - 848 = -18
-18 ÷ 848 = -0.02122641509433962
-0.02122641509433962 x 100 = -2.12%