-37.25% is the change from 102 to 64
Calculation steps:
[( 64 - 102 ) ÷ 102] x 100 = -37.25%
Formula
Percentage change = [(64 - 102) / 102] x 100
Subtract the new number by the original number
64 - 102 = -38
-38 ÷ 102 = -0.37254901960784315
-0.37254901960784315 x 100 = -37.25%