-77.71% is the change from 664 to 148
Calculation steps:
[( 148 - 664 ) ÷ 664] x 100 = -77.71%
Formula
Percentage change = [(148 - 664) / 664] x 100
Subtract the new number by the original number
148 - 664 = -516
-516 ÷ 664 = -0.7771084337349398
-0.7771084337349398 x 100 = -77.71%