-66.99% is the change from 409 to 135
Calculation steps:
[( 135 - 409 ) ÷ 409] x 100 = -66.99%
Formula
Percentage change = [(135 - 409) / 409] x 100
Subtract the new number by the original number
135 - 409 = -274
-274 ÷ 409 = -0.6699266503667481
-0.6699266503667481 x 100 = -66.99%