A dripping faucet wastes a cup of water if it drips for four minutes
2 answers:
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There is infinitely many ratios which are equivalent to 5:9. As we know always we can write divide as fraction, so 
. We can multiply nominator and denominator by the any number (but the same) and get another numbers but ratio will be the same, so equivalent.
For example
10:18,
15:27
For example
10:18,
15:27
