2/3.
Пошаговое объяснение:
(7/15 • 3 3/4) : 2 5/8 = 2/3.
1. 7/15 • 3 3/4 = 7/15 • 15/4 = (7•15)/(15•4) = 7/4;
2. 7/4 : 2 5/8 = 7/4 : 21/8 = 7/4 • 8/21 = (7•8)/(4•21) = (1•2)/((1•3) = 2/3.
2/3.
Пошаговое объяснение:
(7/15 • 3 3/4) : 2 5/8 = 2/3.
1. 7/15 • 3 3/4 = 7/15 • 15/4 = (7•15)/(15•4) = 7/4;
2. 7/4 : 2 5/8 = 7/4 : 21/8 = 7/4 • 8/21 = (7•8)/(4•21) = (1•2)/((1•3) = 2/3.