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12 and 15 go into the denominator 60. 1 and 3 go into 12 and 15.
1 and 3.
Yes, you can, because 15 goes into 15 once and 60 4 times, so it is simplified to 1 over 4. If you don't know your 15 times table, or cannot see 15 in 15 over 60, you can use 5 - 5 goes into 15 3 times and 5 goes into 60 12 times, so it is 3 over 12, whih can be simplified by dividing by 3. 3 goes into 3 once and 3 goes into 12 4 times so it is 1 over 4.
1 and 3 I got that by counting by three's 3,6,9,12,15,18.....
Since 3 is the biggest number that goes into both 12 and 15, you can devide both by 3. That would give you 4/5.