Question

given the number, two-fifths,generate its equivalents forms as a fraction, a decimal, and a percent. in addition, give a real world example in which each form might be used

Answer 1

Two-fifths or $\frac{2}{5}$ is equivalent to the following. 
$\frac{2}{5}$
0.4
40%

2 pizzas being shared among 5 friends is a real-world example in which each form might be used.

I hope this helps!

Answer 2

Decimal: $0.4$ (could be used when using a ruler to count millimeters).
Fraction: $\frac{2}{5}$ (could be used when calculating an equation with ordinary fractions).
Percentage: $40\%$ (could be used in chemistry to calculate upon admixtures).