-73% is the change from 237 to 64
Calculation steps:
[( 64 - 237 ) ÷ 237] x 100 = -73%
Formula
Percentage change = [(64 - 237) / 237] x 100
Subtract the new number by the original number
64 - 237 = -173
-173 ÷ 237 = -0.729957805907173
-0.729957805907173 x 100 = -73%