-66.23% is the change from 151 to 51
Calculation steps:
[( 51 - 151 ) ÷ 151] x 100 = -66.23%
Formula
Percentage change = [(51 - 151) / 151] x 100
Subtract the new number by the original number
51 - 151 = -100
-100 ÷ 151 = -0.6622516556291391
-0.6622516556291391 x 100 = -66.23%