Compound Interest Worksheets - Free Printable

Let’s solve each part step by step.

We are given a table with columns: Amount, Principal, and Interest.
The key formula is:

> Amount = Principal + Interest

So, if we know any two of these, we can find the third.

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Part A: Find the amount, principal, or interest.

#### 1. Principal = $1,800; Interest = $432 → Find Amount
Amount = Principal + Interest
= $1,800 + $432
= $2,232

✔ Check: 1800 + 432 = 2232 → Correct.

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#### 2. Amount = $6,654; Principal = $4,725 → Find Interest
Interest = Amount - Principal
= $6,654 - $4,725
= $1,929

✔ Check: 4725 + 1929 = 6654 → Correct.

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#### 3. Amount = $5,465; Interest = $1,465 → Find Principal
Principal = Amount - Interest
= $5,465 - $1,465
= $4,000

✔ Check: 4000 + 1465 = 5465 → Correct.

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#### 4. Principal = $12,500; Interest = $2,091 → Find Amount
Amount = Principal + Interest
= $12,500 + $2,091
= $14,591

✔ Check: 12500 + 2091 = 14591 → Correct.

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#### 5. Amount = $19,708; Principal = $8,550 → Find Interest
Interest = Amount - Principal
= $19,708 - $8,550
= $11,158

✔ Check: 8550 + 11158 = 19708 → Correct.

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#### 6. Amount = $1,679; Interest = $678 → Find Principal
Principal = Amount - Interest
= $1,679 - $678
= $1,001

✔ Check: 1001 + 678 = 1679 → Correct.

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Part B: Complete the table

We’ll go row by row.

#### Row 1:
Given: Amount = $5,200; Interest = $3,047 → Find Principal
Principal = Amount - Interest
= $5,200 - $3,047
= $2,153

✔ Check: 2153 + 3047 = 5200 → Correct.

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#### Row 2:
Given: Amount = $3,978; Interest = $728 → Find Principal
Principal = Amount - Interest
= $3,978 - $728
= $3,250

✔ Check: 3250 + 728 = 3978 → Correct.

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#### Row 3:
Given: Amount = $8,009; Principal = $4,875 → Find Interest
Interest = Amount - Principal
= $8,009 - $4,875
= $3,134

✔ Check: 4875 + 3134 = 8009 → Correct.

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#### Row 4:
Given: Amount = $17,500; Interest = $2,880 → Find Principal
Principal = Amount - Interest
= $17,500 - $2,880
= $14,620

✔ Check: 14620 + 2880 = 17500 → Correct.

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#### Row 5:
Given: Amount = $2,354; Principal = $1,700 → Find Interest
Interest = Amount - Principal
= $2,354 - $1,700
= $654

✔ Check: 1700 + 654 = 2354 → Correct.

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Final Answer:

Part A:
1. $2,232
2. $1,929
3. $4,000
4. $14,591
5. $11,158
6. $1,001

Part B (table):
Row 1: Principal = $2,153
Row 2: Principal = $3,250
Row 3: Interest = $3,134
Row 4: Principal = $14,620
Row 5: Interest = $654