Question 1026179
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You and your friend collect 180 cans for a food drive. The ratio of cans you collected to cans your friend collected is 4 to 5. 
Use the tape diagram to find how many cans you collected.
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Arrange the cans by groups by including 4 your cans and 5 cans of your friend in each group.
You will get identical groups of cans counting 9 cans in each group.


How many groups it will be?


Correct, {{{180/9}}} = 20 groups.


So, there are 4*20 = 80 of your cans and 5*20 = 100 cans of your friend.