Answer:
The answers are 4. 60 5. 50 and 6. 100
Explanation:
Question 4. 20% of what number is 12?
Number = x
20%x = 12
2x/10 = 12 (20% = 2/10)
2x = 120 (Multiplying by 10 at both sides of the equation)
x = 60 (Dividing by 2 at both sides of the equation)
Part 20 Whole 12 Part 40 Whole 24 Part 60 Whole 36 Part 80 Whole 48 Part 100 Whole 60
Question 5. 10% of what number is 5?
Number = x
10%x = 5
x/10 = 5 (10% = 1/10)
x = 50 (Multiplying by 10 at both sides of the equation)
Part 10 Whole 5 Part 20 Whole 10 Part 40 Whole 20 Part 60 Whole 30 Part 80 Whole 40 Part 100 Whole 50
Question 6. 30% of what number is 30?
Number = x
30%x = 30
3x/10 = 30 (30% = 3/10)
3x = 300 (Multiplying by 10 at both sides of the equation)
x = 100 (Dividing by 3 at both sides of the equation)
Part 30 Whole 30 Part 60 Whole 60 Part 80 Whole 80 Part 100 Whole 100