( 7 целых 1/5*2 целых 2/9)-13 4/7

Question

( 7 целых 1/5*2 целых 2/9)-13 4/7

Answer 1

(7 1/5 * 2 2/9) - 13 4/7 = 2 3/7
1) 7 1/5 * 2 2/9 = 36/5 * 20/9 = 4 * 4 = 16
2) 16 - 13 4/7 = 15 7/7 - 13 4/7 = 2 3/7