-61.11% is the change from 540 to 210
Calculation steps:
[( 210 - 540 ) ÷ 540] x 100 = -61.11%
Formula
Percentage change = [(210 - 540) / 540] x 100
Subtract the new number by the original number
210 - 540 = -330
-330 ÷ 540 = -0.6111111111111112
-0.6111111111111112 x 100 = -61.11%