40-19=21
21/7=3
X=3
Equation:
40=7x+19
If 30% were perfect, 70% were not perfect. So we know that 70% of the total number of photographs is 210.
p(70/100)=210 multiply both sides by 100
70p=21000 divide both sides by 70
p=300
So there are 300 photographs in all.
It would be 0.2
Because
1 divided by 5 = 0.2
To check
0.2*5=1
Hope this helps
Have a great day/night
2/6 which equals 1/3.
This is because 20 out of 60 or 20/60 is reduced to 2/6. Then, you have to simplify it even more. It would be reduced to 1/3 because half of 2 is one and half of 6 is 3.
Let me know if you need any help