-30.1% is the change from 947 to 662
Calculation steps:
[( 662 - 947 ) ÷ 947] x 100 = -30.1%
Formula
Percentage change = [(662 - 947) / 947] x 100
Subtract the new number by the original number
662 - 947 = -285
-285 ÷ 947 = -0.30095036958817317
-0.30095036958817317 x 100 = -30.1%