-59.34% is the change from 664 to 270
Calculation steps:
[( 270 - 664 ) ÷ 664] x 100 = -59.34%
Formula
Percentage change = [(270 - 664) / 664] x 100
Subtract the new number by the original number
270 - 664 = -394
-394 ÷ 664 = -0.5933734939759037
-0.5933734939759037 x 100 = -59.34%