-78.01% is the change from 291 to 64
Calculation steps:
[( 64 - 291 ) ÷ 291] x 100 = -78.01%
Formula
Percentage change = [(64 - 291) / 291] x 100
Subtract the new number by the original number
64 - 291 = -227
-227 ÷ 291 = -0.7800687285223368
-0.7800687285223368 x 100 = -78.01%