60 - 100%
х - 33%
х = (60×33)÷100 = 19,8
7дм=70см 70+2=72см-другая сторона S=70*72=5040см P=70+70+72+72=284
(7 - 1 5 /12 ):6,7+(5,75-3 1/6):15,5=(7- 17/12 ):67/10+(2 1/4- 1/6):155/10=((84-17)/12):<span>67/10+(9/4- 1/6):155/10=67/12*10/67+(27-2)/12*10/155=10/12+25/12*10/155=5/6+5*5/31*6=5/6+25/186=/186*6=(30+150)/1116=180/1116=90/558=45/278</span>