(5 5/28 - 5 1/3 * 1,25 - 1 16/21) : (-1/5)
1) 5 1/3 * 1,25= 16/3 * 125/100= 16/3 * 5/4= 4*5/3=20/3 = 6 2/3
2) 5 5/28 - 6 2/3= 5 15/84 - 6 56/84= - 1 41/84
3) - 1 41/84 - 1 16/21= - 1 41/84 - 1 64/84= - 2 105/84= - 3 21/84= - 3 1/4
4) -3 1/4 : (-1/5)= - 13/4 * (-5)= 65/4= 16 1/4