Sam had $$\frac{3}{4}$$ kg of oil He used $$\frac{2}{3}$$ of it last night.  How much oil is left? Express your answer as $$\frac{A}{B}$$ kg of oil left.<hr>A: <input min="0" type="number" class="lineinput" placeholder="?"> B:<input min="0" type="number" class="lineinput" placeholder="?">