-77.41% is the change from 270 to 61
Calculation steps:
[( 61 - 270 ) ÷ 270] x 100 = -77.41%
Formula
Percentage change = [(61 - 270) / 270] x 100
Subtract the new number by the original number
61 - 270 = -209
-209 ÷ 270 = -0.774074074074074
-0.774074074074074 x 100 = -77.41%