How does the current in a resistor change if the voltage across the resistor is decreased by 4

The current is reduced by 1/4

Explanation:

Voltage, V = IR where I = current and R = resistance.

So, V₁ = I₁R. So, I₁ = V₁/R. Now the new current is I₂ = V₂/R

If V₂ = V₁/4, then I₂ = V₂/R = (V₁/4) / R = V₁/4R = I₁/4

I₂ = I₁/4

The current is reduced by 1/4