13. Converting the ratio 1:6:7 to percentage, we
get
respectively.
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Let the amount be 1p, 6p and 7p
(whenever there is ratio, there is a missing number, here We take as p/
1p +6p+7p=14p =100
p =100/14
% is 100/14, 6×100/14 and 7×100/14
= 7, 43 and 50%
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