-77.61% is the change from 661 to 148
Calculation steps:
[( 148 - 661 ) ÷ 661] x 100 = -77.61%
Formula
Percentage change = [(148 - 661) / 661] x 100
Subtract the new number by the original number
148 - 661 = -513
-513 ÷ 661 = -0.7760968229954615
-0.7760968229954615 x 100 = -77.61%