If Tina sold 7/9 of bibingka, therefore 2/9 is left.
7/9 + 2/9 = 9/9 or 1 whole or total number of bibingka
Let x be the whole or total number of bibingka.
2/9 of the whole is 28
Equation:
[tex] \frac{2}{9} (x) = 28[/tex]
[tex]( \frac{9}{2})( \frac{2}{9})x = 28 ( \frac{9}{2} )[/tex]
x = (14) (9)
x = 126
There were 126 bibingka.
