-34.33% is the change from 667 to 438
Calculation steps:
[( 438 - 667 ) ÷ 667] x 100 = -34.33%
Formula
Percentage change = [(438 - 667) / 667] x 100
Subtract the new number by the original number
438 - 667 = -229
-229 ÷ 667 = -0.34332833583208394
-0.34332833583208394 x 100 = -34.33%