-15.15% is the change from 614 to 521
Calculation steps:
[( 521 - 614 ) ÷ 614] x 100 = -15.15%
Formula
Percentage change = [(521 - 614) / 614] x 100
Subtract the new number by the original number
521 - 614 = -93
-93 ÷ 614 = -0.15146579804560262
-0.15146579804560262 x 100 = -15.15%