145.75% is the change from 212 to 521
Calculation steps:
[( 521 - 212 ) ÷ 212] x 100 = 145.75%
Formula
Percentage change = [(521 - 212) / 212] x 100
Subtract the new number by the original number
521 - 212 = 309
309 ÷ 212 = 1.4575471698113207
1.4575471698113207 x 100 = 145.75%