Printable math worksheet for finding the whole from a percentage.

Let’s solve each problem step by step.

We are given: “X is Y% of ___” → We need to find the whole number that X is Y percent of.

The formula is:
> Whole = Part ÷ (Percent as a decimal)

Or, in simpler terms:
> Divide the part by the percentage (written as a decimal).

Example:
“5 is 10% of ___”
→ 10% = 0.10
→ 5 ÷ 0.10 = 50

Let’s go one by one:

---

1) 5 is 10% of:
10% = 0.10
5 ÷ 0.10 = 50

2) 45 is 25% of:
25% = 0.25
45 ÷ 0.25 = 180

3) 20 is 50% of:
50% = 0.50
20 ÷ 0.50 = 40

4) 9 is 90% of:
90% = 0.90
9 ÷ 0.90 = 10

5) 27 is 30% of:
30% = 0.30
27 ÷ 0.30 = 90

6) 6 is 15% of:
15% = 0.15
6 ÷ 0.15 = 40

7) 80 is 40% of:
40% = 0.40
80 ÷ 0.40 = 200

8) 70 is 5% of:
5% = 0.05
70 ÷ 0.05 = 1400

9) 100 is 80% of:
80% = 0.80
100 ÷ 0.80 = 125

10) 9 is 25% of:
25% = 0.25
9 ÷ 0.25 = 36

11) 45 is 30% of:
30% = 0.30
45 ÷ 0.30 = 150

12) 90 is 75% of:
75% = 0.75
90 ÷ 0.75 = 120

13) 12 is 15% of:
15% = 0.15
12 ÷ 0.15 = 80

14) 55 is 100% of:
100% = 1.00
55 ÷ 1.00 = 55

15) 85 is 10% of:
10% = 0.10
85 ÷ 0.10 = 850

16) 108 is 60% of:
60% = 0.60
108 ÷ 0.60 = 180

---

Now, let’s double-check a few tricky ones:

- #8: 70 ÷ 0.05 → 70 ÷ (5/100) = 70 × (100/5) = 70 × 20 = 1400 ✔
- #12: 90 ÷ 0.75 → 90 ÷ (3/4) = 90 × (4/3) = 120 ✔
- #16: 108 ÷ 0.6 → 108 ÷ (6/10) = 108 × (10/6) = 18 × 10 = 180 ✔

All look correct.

──────────────────────────────────────

Final Answer:
1) 50
2) 180
3) 40
4) 10
5) 90
6) 40
7) 200
8) 1400
9) 125
10) 36
11) 150
12) 120
13) 80
14) 55
15) 850
16) 180