-25.5% is the change from 251 to 187
Calculation steps:
[( 187 - 251 ) ÷ 251] x 100 = -25.5%
Formula
Percentage change = [(187 - 251) / 251] x 100
Subtract the new number by the original number
187 - 251 = -64
-64 ÷ 251 = -0.2549800796812749
-0.2549800796812749 x 100 = -25.5%