-61.47% is the change from 667 to 257
Calculation steps:
[( 257 - 667 ) ÷ 667] x 100 = -61.47%
Formula
Percentage change = [(257 - 667) / 667] x 100
Subtract the new number by the original number
257 - 667 = -410
-410 ÷ 667 = -0.6146926536731634
-0.6146926536731634 x 100 = -61.47%