-21.93% is the change from 684 to 534
Calculation steps:
[( 534 - 684 ) ÷ 684] x 100 = -21.93%
Formula
Percentage change = [(534 - 684) / 684] x 100
Subtract the new number by the original number
534 - 684 = -150
-150 ÷ 684 = -0.21929824561403508
-0.21929824561403508 x 100 = -21.93%