помогите 15 баллов
2 3⁄5 : (5⁄9 + 5,3)

2 3⁄5 : (5⁄9 + 5,3)=1) 5/9+5 3/10=5 50/90+27/90=5 77/902) 2 3/5: 5 77/90=13/5:527/90=13/5*90/527=234/527

2_3/5 : (5/9 + 5,3) = 234 / 527       

         2         1

1) 5/9 + 5,3 = 5/9 + 5_3/10 = 50/90 + 5_27/90= 5_77/90

2) 2_3/5 : 5_77/90 = 13/5 : 527/90 = 13/5 * 90/527 = (13*90) / (5 * 527) = (13*18) / 527 = 234 / 527