-21.24% is the change from 678 to 534
Calculation steps:
[( 534 - 678 ) ÷ 678] x 100 = -21.24%
Formula
Percentage change = [(534 - 678) / 678] x 100
Subtract the new number by the original number
534 - 678 = -144
-144 ÷ 678 = -0.21238938053097345
-0.21238938053097345 x 100 = -21.24%