-61.11% is the change from 270 to 105
Calculation steps:
[( 105 - 270 ) ÷ 270] x 100 = -61.11%
Formula
Percentage change = [(105 - 270) / 270] x 100
Subtract the new number by the original number
105 - 270 = -165
-165 ÷ 270 = -0.6111111111111112
-0.6111111111111112 x 100 = -61.11%