-70.41% is the change from 490 to 145
Calculation steps:
[( 145 - 490 ) ÷ 490] x 100 = -70.41%
Formula
Percentage change = [(145 - 490) / 490] x 100
Subtract the new number by the original number
145 - 490 = -345
-345 ÷ 490 = -0.7040816326530612
-0.7040816326530612 x 100 = -70.41%