-15a-5-11=-16
(152 ц 3/4-148 ц 3/8)*0.3:0.2=(152 ц 6/8-148ц 3/8)*0.3:0.2=4 ц 3/8 *0.3:0.2=35/8*3/10 :2/10=105/80 :2/10=105/16=6ц 9/16