The exchange rate of Pakistani rupee against US dollar witnessed a decrease of 57 paisas in interbank on Monday and traded at Rs 163 against Rs 163.57 on last trading day, State Bank of Pakistan (SBP) reported.  However, according to Forex Association of Pakistan, the buying and selling rates of Dollar in open market were recorded at Rs 160.65 and Rs 162.65 respectively.  The SBP further reported that in interbank, the price of Euro traded at Rs183.25 against the last closing of Rs182.72 on last trading day.  The exchange rate of British Pound which was traded at Rs202.5  as compared to its last closing of Rs202.17. The exchange rates of Saudi Riyal and Arab Emirates Dirham traded at at Rs41.8 and Rs45.5 respectively.