-68.63% is the change from 51 to 16
Calculation steps:
[( 16 - 51 ) ÷ 51] x 100 = -68.63%
Formula
Percentage change = [(16 - 51) / 51] x 100
Subtract the new number by the original number
16 - 51 = -35
-35 ÷ 51 = -0.6862745098039216
-0.6862745098039216 x 100 = -68.63%