1. 92% of what number is 69?
2. 20% of what number is 3.4?
3. 10% of what number is 80?
4. 4% of what number is 25?

We have to use proportion
92% 69
100% x
x=69*100:92=75

20% 3.4
100% x
x=100*3.4:20=17

10% 80
100% x
x=100*80:10=800

4%  25
100% x
x=100*25:4=625 

1) 92%of x=69
   92/100 of x=69
0.92x=69
x=69/0.92
x=75

2) 20% of x=3.4
    20/100 of x=3.4
0.2x=3.4
x=3.4/0.2
x=17

3)10% of x=80
   10/100 of x=80
0.1x=80
x=80/0.1
x=800

4) 4% of x=25
    4/100 of x=25
 0.04x=25
x=25/0.04
x=625

The final answer is 3x3+6x2+8x+24+47x−2mark me brainliest