The answer is 121.225.
Explanation:
Because you would start with turning 42 and 5/8 into 341/8 then do 341 divided by 8 to get 42.625 as the decimal, then start turning 393/5 into a decimal by 393 divided by 5 to get 78.6 as your decimal then add them together like this: 42.625 + 78.6 = 121.225 as your answer.
Claire threw the javelin 42.625 feet but grace threw the javelin 78.6 feet.
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