-78.06% is the change from 670 to 147
Calculation steps:
[( 147 - 670 ) ÷ 670] x 100 = -78.06%
Formula
Percentage change = [(147 - 670) / 670] x 100
Subtract the new number by the original number
147 - 670 = -523
-523 ÷ 670 = -0.7805970149253731
-0.7805970149253731 x 100 = -78.06%