-62.03% is the change from 661 to 251
Calculation steps:
[( 251 - 661 ) ÷ 661] x 100 = -62.03%
Formula
Percentage change = [(251 - 661) / 661] x 100
Subtract the new number by the original number
251 - 661 = -410
-410 ÷ 661 = -0.6202723146747352
-0.6202723146747352 x 100 = -62.03%