ANSWER IS $64\mathrm{.}1$

PLEASE show me how to figure this out STEP BY STEP

Golden Graham Crackers compete in a regional graham cracker market. Leading brands in this market $($with their retail sales$)$ included:

Purity Grahams $$78\mathrm{.}3$ million

Golden Graham Crackers $$50\mathrm{.}2$ million

Crunchy Crackers $$57\mathrm{.}4$ million

JustRight Grahams $$43\mathrm{.}1$ million

Other brands $$101\mathrm{.}4$ million

Calculate Golden Graham Crackers' RELATIVE MARKET SHARE. $($Round your answer to the nearest tenth of a percent. Report $27\mathrm{.}5\%,$ for example, as $"27\mathrm{.}5".)$

EXACT SUBJECT IS MARKETING METRICS