²¼»ù½Õ¾ã¾÷¨î¤èµ{¦¡¡G
(0.5¡Ñ¤W¤@¦~12¤ëºî¦X®ø¶Oª«»ù«ü¼Æ«ö¦~ÅÜ°Ê)+ (0.5¡Ñ¤W¤@¦~12¤ë¹B¿é·~¦W¸q¤u¸ê«ü¼Æ«ö¦~ÅÜ°Ê)-¥Í²£¤O¦]¯À¼ÆÈ = ¾ãÅé²¼»ù½Õ¾ã´T«×
®Ú¾Ú¾÷¨îpºâ¥X¤µ¦~²¼»ù¥[´T¡G
(0.5¡Ñ4.3%)+(0.5¡Ñ4.1%)-0.6% = +3.6%
»sªí¡G»´ä¤å¶×³ø°OªÌ ùÄ~²±