Question

[(2,666...):5/3+0,25-1/10]:7.2^-3

Answer 1

2,666 = (26-2)/9 = 24/9 = 24:3/9:3 = 8/3
[(8/3):5/3+0,25-0,1]:7.1/2³ = 
[(8/3)x(3/5)+0,15]:7.1/8 = 
[(8x3)/(3x5)+0,15]:7/8 = 
[8/5+0,15]:7/8 = 
[1,6+0,15]:7/8 = 
1,75:0,875 = 
175/100 : 875/1000 = 
175/100 x 1000x875 = 
175/10x875 = 
175/8750 = 
175:25/8750:25 = 
7/350 ou
0,02