Answer:
Step-by-step explanation: you can multiply both of them
First do 189-99. thats 90. then do 90/10 which is 9
Answer: 
Step-by-step explanation:
Given
Rami practices his saxophone for
hour on 4 day each week
So, for a week she practices around

Converting it into mixed fraction

Eric shades 4/6 or 2/3 of the whole blue
8/8-2/8=6/8
now he shades 4 out of the eight
so 4/8 or 1/2