135.35% is the change from 215 to 506
Calculation steps:
[( 506 - 215 ) ÷ 215] x 100 = 135.35%
Formula
Percentage change = [(506 - 215) / 215] x 100
Subtract the new number by the original number
506 - 215 = 291
291 ÷ 215 = 1.3534883720930233
1.3534883720930233 x 100 = 135.35%