5. If a number is reduced by \( 40 \% \) it becomes two-third of another number. What is the ratio of the first number to the second number? (1) \( 10: 9 \) (2) \( 8: 9 \) (3) \( 9: 8 \) (4) \( 9: 10 \) (5) None of these
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