-65.89% is the change from 991 to 338
Calculation steps:
[( 338 - 991 ) ÷ 991] x 100 = -65.89%
Formula
Percentage change = [(338 - 991) / 991] x 100
Subtract the new number by the original number
338 - 991 = -653
-653 ÷ 991 = -0.6589303733602422
-0.6589303733602422 x 100 = -65.89%