-77.78% is the change from 270 to 60
Calculation steps:
[( 60 - 270 ) ÷ 270] x 100 = -77.78%
Formula
Percentage change = [(60 - 270) / 270] x 100
Subtract the new number by the original number
60 - 270 = -210
-210 ÷ 270 = -0.7777777777777778
-0.7777777777777778 x 100 = -77.78%