Answer:
4/10
Step-by-step explanation:
An equivalent fraction is a fraction that would reduce to the same simplest form.
4/10 works because if you find the LCM and divide the numerator and denominator by that, it will reduce to 2/5.
The LCM is 2. 4/2 = 2 and 10/2 = 5, so
4/10 = 2/5
