-54.29% is the change from 700 to 320
Calculation steps:
[( 320 - 700 ) ÷ 700] x 100 = -54.29%
Formula
Percentage change = [(320 - 700) / 700] x 100
Subtract the new number by the original number
320 - 700 = -380
-380 ÷ 700 = -0.5428571428571428
-0.5428571428571428 x 100 = -54.29%