(5 1/2+2 3/5)*5/9
(7-2 5/16)*4/25

1)
  5 1/2 = 11/2
  2 3/5 = 13/5
  (11/2+13/5 ) *5/9=  (55/10 + 26/10) *5/9= 81/10 * 5/9 = 9/2  = 4.5 = 4 1/2
2)
  2 5/16 = 37/16
 ( 7- 37/16)* 4/25 =  ( 112/16 - 37/16) * 4/25 = 75/16 * 4/25 = 5/4 = 1 1/4 = 1.25