For Exp, JExp, Drop  
	   Script: <" 
	        bonus2 bExpAddRace,RC_All,100; // Increase Exp Rate 1x 
	        bonus2 bJExpAddRace,RC_All,100; // Increase Exp Rate 1x 
	    "> 
	    OnEquipScript: <" sc_start SC_CASH_RECEIVEITEM,-1,100; "> // Start drop rate "-1 Infinite" 1x 
	    OnUnequipScript: <" sc_end SC_CASH_RECEIVEITEM; "> //Stop drop rate  
	So as for your needs  
	    Script: <" 
	        bonus2 bExpAddRace,RC_All,15; // Increase Exp Rate 15% 
	    "> 
	    OnEquipScript: <" sc_start SC_CASH_RECEIVEITEM,-1,15; "> // Start drop rate "-1 Infinite" 15% 
	    OnUnequipScript: <" sc_end SC_CASH_RECEIVEITEM; "> //Stop drop rate