-91.75% is the change from 667 to 55
Calculation steps:
[( 55 - 667 ) ÷ 667] x 100 = -91.75%
Formula
Percentage change = [(55 - 667) / 667] x 100
Subtract the new number by the original number
55 - 667 = -612
-612 ÷ 667 = -0.9175412293853074
-0.9175412293853074 x 100 = -91.75%