(5/24+5/16)•(1 2/3-3/5)•1 4/5 надо решить

1) 5/24 + 5/16 = 10/48 + 15/48 = 25/48   
2) 1 2/3 - 3/5 = 1 10/15 - 9/15 = 1 1/15   
3) 25/48 * 1 1/15 = 25/48 * 16/15 = 5/9   
4) 5/9 * 1 4/5 = 5/9 * 9/5 = 1