-64.14% is the change from 251 to 90
Calculation steps:
[( 90 - 251 ) ÷ 251] x 100 = -64.14%
Formula
Percentage change = [(90 - 251) / 251] x 100
Subtract the new number by the original number
90 - 251 = -161
-161 ÷ 251 = -0.6414342629482072
-0.6414342629482072 x 100 = -64.14%