-57.17% is the change from 642 to 275
Calculation steps:
[( 275 - 642 ) ÷ 642] x 100 = -57.17%
Formula
Percentage change = [(275 - 642) / 642] x 100
Subtract the new number by the original number
275 - 642 = -367
-367 ÷ 642 = -0.5716510903426791
-0.5716510903426791 x 100 = -57.17%