Question

Find the base of the following:

1. 20% of a number is 40
2. 40% of a number is 20
3. 70% of a number is 35
4. 80% of a number is 84
5. 20 is 5% of what number

help me please​

Answer 1

1. 8

2. 50

3. 50

4. 105

5. 25

Step-by-step explanation: