Question

номер 85.помогите решить, пожалуйста

Answer 1

$(3 \frac{1}{4} + 3 \frac{5}{6} ) \div (5 \frac{3}{4} - 3 \frac{2}{3} ) = ( \frac{13}{4} + \frac{23}{6} ) \div ( \frac{23}{4} - \frac{11}{3} ) = \frac{85}{12} \div \frac{25}{12} = \frac{85}{12} \times \frac{12}{25} = \frac{85}{25} = \frac{17}{5}$

17/5 — 100%

x — 40%

x = (17/5 × 40) / 100 = 136 / 100 = 34/25

Answer 2

Ответ:

Пошаговое объяснение:

1) 3. 1/4 + 3. 5/6 = 3. 3/12 + 3. 10/12 = 6. 13/12 = 7. 1/12

2) 5. 3/4 - 3. 2/3 = 5. 9/12 - 3. 8/12 = 2. 1/12

3) 7. 1/12 : 2. 1/12 = 85/12 : 25/12 = 85/12 * 12/25 = 85/25 = 17/5

40% = 40 : 100 = 40/100 = 2/5

2/5 * 17/5 = 34/25 = 1. 9/25

Ответ: 1. 9/25