-19.88% is the change from 337 to 270
Calculation steps:
[( 270 - 337 ) ÷ 337] x 100 = -19.88%
Formula
Percentage change = [(270 - 337) / 337] x 100
Subtract the new number by the original number
270 - 337 = -67
-67 ÷ 337 = -0.19881305637982197
-0.19881305637982197 x 100 = -19.88%