-62.96% is the change from 270 to 100
Calculation steps:
[( 100 - 270 ) ÷ 270] x 100 = -62.96%
Formula
Percentage change = [(100 - 270) / 270] x 100
Subtract the new number by the original number
100 - 270 = -170
-170 ÷ 270 = -0.6296296296296297
-0.6296296296296297 x 100 = -62.96%