728 in the ratio 3 to 5?

To divide something into a ratio like this you need to first see how many parts are involved.

In this instance 3 to 5 totals 8.

So we need to divide the number by 8, then multiply by 3 and by 5

728 / 8 = 91

91 x 3 = 273

91 x 5 = 455

273 + 455 = 728

so, 273 : 455 = 3 : 5