Mr Yeo had some sweets and chocolates.<br>The ratio of the number of sweets that he had to the number of chocolates that he had was 10 : 3.<br>He gave away some sweets and the ratio of the number of sweets that he had to the number of chocolates that he had became 3 : 2. <hr> What percentage of his sweets did he give away? <br> <input min="0" type="number" id ="imp6pg115q3_1" class="lineinput" placeholder="?" />%