-31.98% is the change from 491 to 334
Calculation steps:
[( 334 - 491 ) ÷ 491] x 100 = -31.98%
Formula
Percentage change = [(334 - 491) / 491] x 100
Subtract the new number by the original number
334 - 491 = -157
-157 ÷ 491 = -0.319755600814664
-0.319755600814664 x 100 = -31.98%