-13.5% is the change from 948 to 820
Calculation steps:
[( 820 - 948 ) ÷ 948] x 100 = -13.5%
Formula
Percentage change = [(820 - 948) / 948] x 100
Subtract the new number by the original number
820 - 948 = -128
-128 ÷ 948 = -0.1350210970464135
-0.1350210970464135 x 100 = -13.5%