-54.63% is the change from 670 to 304
Calculation steps:
[( 304 - 670 ) ÷ 670] x 100 = -54.63%
Formula
Percentage change = [(304 - 670) / 670] x 100
Subtract the new number by the original number
304 - 670 = -366
-366 ÷ 670 = -0.5462686567164179
-0.5462686567164179 x 100 = -54.63%