-29.5% is the change from 939 to 662
Calculation steps:
[( 662 - 939 ) ÷ 939] x 100 = -29.5%
Formula
Percentage change = [(662 - 939) / 939] x 100
Subtract the new number by the original number
662 - 939 = -277
-277 ÷ 939 = -0.29499467518636846
-0.29499467518636846 x 100 = -29.5%