-41.28% is the change from 109 to 64
Calculation steps:
[( 64 - 109 ) ÷ 109] x 100 = -41.28%
Formula
Percentage change = [(64 - 109) / 109] x 100
Subtract the new number by the original number
64 - 109 = -45
-45 ÷ 109 = -0.41284403669724773
-0.41284403669724773 x 100 = -41.28%