-64.08% is the change from 142 to 51
Calculation steps:
[( 51 - 142 ) ÷ 142] x 100 = -64.08%
Formula
Percentage change = [(51 - 142) / 142] x 100
Subtract the new number by the original number
51 - 142 = -91
-91 ÷ 142 = -0.6408450704225352
-0.6408450704225352 x 100 = -64.08%