1992 ਵਿੱਚ ਵਾਤਾਵਰਣ ਸਬੰਧੀ ਕਾਨਫਰੰਸ ਕਿੱਥੇ ਹੋਈ ਸੀ
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Explanation:
A fraction becomes 1/3 when 1 is subtracted from the numerator. It become 1/4 when 8 is added to its denominator. Hence, the fraction is 5/12.
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