Allen, Chris and Davis shared some sweets.<br>$$\frac{2}{3}$$ of Allen's sweets is equal to $$\frac{1}{5}$$ of Chris’ sweets.<br>$$\frac{1}{2}$$ of Allen's sweets is equal to $$\frac{9}{10}$$ of Davis’ sweets.<hr> Find the ratio of the number of sweets Allen had to the total number of sweets the three boys had.<br> <input min="0" type="number" id="imp6pg087q6_1" class="lineinput" placeholder="?"> : <input min="0" type="number" id="imp6pg087q6_2" class="lineinput" placeholder="?">