-70.76% is the change from 342 to 100
Calculation steps:
[( 100 - 342 ) ÷ 342] x 100 = -70.76%
Formula
Percentage change = [(100 - 342) / 342] x 100
Subtract the new number by the original number
100 - 342 = -242
-242 ÷ 342 = -0.7076023391812866
-0.7076023391812866 x 100 = -70.76%