278.38% is the change from 74 to 280
Calculation steps:
[( 280 - 74 ) ÷ 74] x 100 = 278.38%
Formula
Percentage change = [(280 - 74) / 74] x 100
Subtract the new number by the original number
280 - 74 = 206
206 ÷ 74 = 2.7837837837837838
2.7837837837837838 x 100 = 278.38%