-61.29% is the change from 620 to 240
Calculation steps:
[( 240 - 620 ) ÷ 620] x 100 = -61.29%
Formula
Percentage change = [(240 - 620) / 620] x 100
Subtract the new number by the original number
240 - 620 = -380
-380 ÷ 620 = -0.6129032258064516
-0.6129032258064516 x 100 = -61.29%