The answer is: a = 4.3 .
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Explanation:
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Given:
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a/6 = 5/7 ; Solve for "a" ;
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7a = 5*6 ;
7a = 30 ;
Divide EACH side of the equation by "7" ; to isolate "a" on one side of the equation; and to solve for "a" ;
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7a / 7 = 30 / 7 ;
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a = 30 / 7 = 4.2857142857142857 ;
→ round to 1 decimal digit ;
→ The first 2 decimal digits are: 4.28 ;
Since the 2nd decimal digit is "8" (i.e., "5" or greater),
we round the first decimal digit to the higher number;
→ The answer is: a = 4.3 .
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