Last month Dory biked 11 times as many miles as karly. Together theybiked a total of 156 miles. How many miles did Dory bike last month show all working.

It's a ratio of 11:1

So there are 12 parts in total

So 156 : 12 = 13

So 1 part of the ratio is 13miles

You then want to times it by the 11 parts that Dory has so

13 * 11 is 143