-69.38% is the change from 320 to 98
Calculation steps:
[( 98 - 320 ) ÷ 320] x 100 = -69.38%
Formula
Percentage change = [(98 - 320) / 320] x 100
Subtract the new number by the original number
98 - 320 = -222
-222 ÷ 320 = -0.69375
-0.69375 x 100 = -69.38%