-82.49% is the change from 257 to 45
Calculation steps:
[( 45 - 257 ) ÷ 257] x 100 = -82.49%
Formula
Percentage change = [(45 - 257) / 257] x 100
Subtract the new number by the original number
45 - 257 = -212
-212 ÷ 257 = -0.8249027237354085
-0.8249027237354085 x 100 = -82.49%