
Matt H. answered 05/11/15
Tutor
5.0
(335)
At your kid's age, I hated math, too. Not any more!
Hi Coco--
The percentages you know so far add up to 70 %, which means the remaining part of the journey is 30%.
So you need 30 % x 22 km = 6.6 kilometers by train.
If you don't like that method, you can figure out TEN percent of 22, which is 2.2. Then you multiply that by 3 (because 10 x 3 = 30) and once again you get 6.6
Hope this helps!
Matt in NY