284.3% is the change from 172 to 661
Calculation steps:
[( 661 - 172 ) ÷ 172] x 100 = 284.3%
Formula
Percentage change = [(661 - 172) / 172] x 100
Subtract the new number by the original number
661 - 172 = 489
489 ÷ 172 = 2.8430232558139537
2.8430232558139537 x 100 = 284.3%