-78.52% is the change from 661 to 142
Calculation steps:
[( 142 - 661 ) ÷ 661] x 100 = -78.52%
Formula
Percentage change = [(142 - 661) / 661] x 100
Subtract the new number by the original number
142 - 661 = -519
-519 ÷ 661 = -0.7851739788199698
-0.7851739788199698 x 100 = -78.52%