Решите по действиям (3 1/15-1 1/15: 1 3/5+2/5)*2 1/7-1 1/7=?

1) 1 1/15 : 1 3/5 = 16/15 : 8/5  = 2/3 
2) 3 1/15 - 2/3 + 2/5 = 2 16/15  - 10/15 + 6/15 = 2 6/15 + 6/15 = 2 12/15
3) 2 12/15 * 2 1/7 = 42/15 * 15/7 = 42/7 = 6 
4) 6 - 1 1/7 = 5 7/7 - 1 1/7 = 4 6/7 
ОТВЕТ 4 6/7