Answer:
the answers equivalent to 5:4 is 10:8
Explanation:
The reason I only chose 10:8 is because all the other answers are not even multiples of 5 or 4 or they were multiples of 5 and 4 but they were not multiplied by the same number.
Example:
25:15 = okay so 5 can go into 25, 5 times but 4 cannot go into 15
20:19 = okay so 5 can go into 20, 4 times but 4 cannot go into 19
30:20 = though 5 can go into 30 and 4 into 20 they are not multiplied by the same number
15:16 = though 5 can go into 15 and 4 into 16 they are not multiplied by the same number
and last but not least 100:85 = okay so 5 can go into 100, 20 times but 4 cannot go into 85
So it leaves 10:8= 5 can go into 10, 2 times and 4 can go into 8, 2 times so this is your answer.
Hope this helps you!!!
5 * 2 = 10 and 4 * 2 = 8