( 3 цел. 7/16 : 20 цел 5/8 - 2/15) *0,9 +1,17 2) 7,5 * 2 цел 31/ 40 : 16,65+0, 25...

Решите задачу:

$(3 \frac{7}{16} \div 20 \frac{5}{8} - \frac{2}{15} ) \times 0.9 + 1.7 \\ (3 \frac{7}{16} \times \frac{1}{4} \times \frac{1}{8} - \frac{2}{15} \times \frac{9}{10} + \frac{117}{100} \\ \frac {709}{2560} \times \frac{3}{10} + \frac{117}{100} = \frac{1113}{1024} \\ 1 \frac{89}{1024} \\ \\ \\ 7.5 + 2 \frac{31}{40} \div 16.65 + 0.25 \\ 15 \frac{31}{40} \times \frac{20}{333} + \frac{1}{4} \\ \frac{155}{222} + \frac{1}{4} \\ \frac{421}{444}$