Mr Jackson's salary is $$\frac{3}{4}$$ of Mr Koh's salary. <hr> Find the ratio of Mr Yeo's salary to Mr Koh's salary. <br><input min="0" type="number" id ="imp6pg080q7_1" class="lineinput" placeholder="?" /> : <input min="0" type="number" id ="imp6pg080q7_2" class="lineinput" placeholder="?" />