-16.33% is the change from 251 to 210
Calculation steps:
[( 210 - 251 ) ÷ 251] x 100 = -16.33%
Formula
Percentage change = [(210 - 251) / 251] x 100
Subtract the new number by the original number
210 - 251 = -41
-41 ÷ 251 = -0.16334661354581673
-0.16334661354581673 x 100 = -16.33%