Respuesta :

28.22
Take .28 and multiply it by 100.8 to find the sum
You can cross multiply to find this. Put the amount you're trying to find (x) over 100.80, and set it equal to 28/100.
x/100.8 = 28/100
100.8 x 28 = 100x
2822.4 = 100x
/100
28.224 = x