-93.77% is the change from 337 to 21
Calculation steps:
[( 21 - 337 ) ÷ 337] x 100 = -93.77%
Formula
Percentage change = [(21 - 337) / 337] x 100
Subtract the new number by the original number
21 - 337 = -316
-316 ÷ 337 = -0.9376854599406528
-0.9376854599406528 x 100 = -93.77%