-96.27% is the change from 670 to 25
Calculation steps:
[( 25 - 670 ) ÷ 670] x 100 = -96.27%
Formula
Percentage change = [(25 - 670) / 670] x 100
Subtract the new number by the original number
25 - 670 = -645
-645 ÷ 670 = -0.9626865671641791
-0.9626865671641791 x 100 = -96.27%