40 percent of 4200 can be written as 20 percent * 4200 =
Use the percentage formulae (P% × Y = X) to find out 40% of 4200
P is 40, Y is 4200, so the equation will be 40% × 4200 = X
Percentage calculation with steps:
X = ( 40 * 4200 ) / 100
X = 168000 / 100
X = 1680