-57.53% is the change from 591 to 251
Calculation steps:
[( 251 - 591 ) ÷ 591] x 100 = -57.53%
Formula
Percentage change = [(251 - 591) / 591] x 100
Subtract the new number by the original number
251 - 591 = -340
-340 ÷ 591 = -0.5752961082910322
-0.5752961082910322 x 100 = -57.53%