1) 7​ 3/4 ​​+(0.48−​4​​1​​−30%)= 2) 45% x 5 2/3 - 4/9 =

7¾ + (48/100 - 4100/100 - 30/100)
= 31/4 - 4082/100
= 775/100 - 4082/100
= - 3307/100
= -33,07

45% ×5⅔ - 4/9
= 45/100 × 17/3 - 4/9
= 9/20 × 17/3 - 4/9
= 153/60 - 4/9
= 51/20 - 4/9
= 459/180 - 80/180
= 379/180
= 2 19/180