-62.54% is the change from 670 to 251
Calculation steps:
[( 251 - 670 ) ÷ 670] x 100 = -62.54%
Formula
Percentage change = [(251 - 670) / 670] x 100
Subtract the new number by the original number
251 - 670 = -419
-419 ÷ 670 = -0.6253731343283582
-0.6253731343283582 x 100 = -62.54%