-29.53% is the change from 938 to 661
Calculation steps:
[( 661 - 938 ) ÷ 938] x 100 = -29.53%
Formula
Percentage change = [(661 - 938) / 938] x 100
Subtract the new number by the original number
661 - 938 = -277
-277 ÷ 938 = -0.2953091684434968
-0.2953091684434968 x 100 = -29.53%