Answer:
320:520 or 320 to 520 or 320/520
Explanation:
1st step: add the two comparisons of numbers together,
= 136 + 184 = 320
2nd step: do the same with the second set of numbers,
= 308 + 212 = 520
3rd step:
Take both sums or total and put them in ratio form,
= 320 and 520
4th step: Rewrite in ration form (There are many ways of doing this, here are a few:)
320:520 or 320 to 520 or 320/520