To simplify (2/5)^3, we need to cube the fraction 2/5. To do this, we multiply the numerator and denominator by themselves three times:
(2/5)^3 = (2/5) × (2/5) × (2/5)
Multiplying the numerators and denominators, we get:
(2 × 2 × 2) / (5 × 5 × 5)
Simplifying the numerator and denominator, we get:
8 / 125
Therefore, (2/5)^3 simplifies to 8/125.