15%=3
5%=1
5(20)=100
1(20)=20
So, there are 20 students in the class.
Answer:
3 : 1
Step-by-step explanation:
We have to compare the value of two sides.
Ratio of sides = 12 : 4 = 
= 3 : 1
12£ and 42£
Step-by-step explanation:
gethin gets 2/9
David gets 7/9
total money is equal to 54
Gethin gets 54x 2/9=12
David gets 54x7/9=42
The square root of 100 is 10. This is also a great number because it can be easily squared so you can have an even answer.