-21.47% is the change from 680 to 534
Calculation steps:
[( 534 - 680 ) ÷ 680] x 100 = -21.47%
Formula
Percentage change = [(534 - 680) / 680] x 100
Subtract the new number by the original number
534 - 680 = -146
-146 ÷ 680 = -0.21470588235294116
-0.21470588235294116 x 100 = -21.47%