Answer:
40
Explanation:
14 = 35% of x 
35% = 0.35 
So lets make an equation and solve for x: 
14 = 0.35x
x = 14÷0.35 
x = 40 
To check our answer let's put it back into the question : 
35% of 40 = 14 
10% = 4 , 30% = 12 , 5% = 2 
35% = 12+2 = 14 ✅
Hope this helped and have a good day