Найдите значение выражения 3 5/8 * 2 1/3 - 2 1/3 * 5/8 - 7 * 5/8

3 5/8 * 2 1/3 - 2 1/3 * 5/8 - 7 * 5/8 =
2 1/3 * (3 5/8 - 5/8) - 7 * 5/8 =
2 1/3 * 3 - 7 * 5/8 = 
7/3 * 3 - 7 * 5/8 = 
7 - 7 * 5/8 = 
7 * (1 - 5/8) = 
7 * 3/8 = 
21/8 = 2 5/8