Let that certain number be 'n'
50% (n) = 39
50% ⇒ 0.5
0.5 (n) = 39
Divide both sides by 0.5
0.5n = 39
/0.5 /0.5
n = 78.
So that certain number is actually <em><u>78! :)</u></em>
CROSS CHECK:
50% of 78
0.5 × 78
= 39
Hope this helps! :)
If feet:
34' 4" - 8' = 26' 4"
if inches: = 33' 8"
So I think the rule is that you divide two exponents with the same base, you keep the base and subtract the powers.
144/12 is 12
so it is equally divided
