MJ
MOT Juice Labs
Percent Calc
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Utility tool

Percentage Calculator Suite

Calculate percentages, comparisons, reverse percentages, compound growth, margins, markups, targets and reporting breakdowns from one MOT Juice Labs workspace.

1) What is X% of N?

Formula: (X ÷ 100) × N
Basic
Enter values to calculate.

2) A is what percent of B?

Formula: (A ÷ B) × 100
Basic
Enter values to calculate.

3) Percent change (Old → New)

Default formula: ((New − Old) ÷ |Old|) × 100
Comparison
Enter values to calculate.

4) Add or subtract a percent

Formula: N × (1 ± X/100)
Reverse / Adjust
Enter values to calculate.

5) Reverse percentage (find the original)

Example: “Final is after a 20% discount” → find original.
Very common
Enter values to calculate.
Uses: Original = F ÷ (1 ± X/100). Discount uses “−”, increase uses “+”.

6) Percentage difference (symmetric)

Formula: |A − B| ÷ ((|A| + |B|)/2) × 100
Comparison
Enter values to calculate.
This avoids “choosing a baseline” like percent change does.

7) Compound growth & CAGR

Finance / inflation / growth scenarios.
Finance
A) Final value from rate + years
Enter values to calculate.
B) CAGR (rate from start + final + years)
Enter values to calculate.
Assumes annual compounding: Final = P(1 + r)^n and r = (F/P)^(1/n) − 1.

8) Margin vs markup

Given cost + selling price, compute profit, margin, and markup.
Business
Enter values to calculate.
Margin = Profit ÷ Price. Markup = Profit ÷ Cost.

9) Target value to be X% higher/lower

Formula: Target = Base × (1 ± X/100)
Planning
Enter values to calculate.

10) Percentage of total (breakdown)

Enter multiple values and see each one’s share of the total.
Reporting
Label
Value
% of total
Total: —
Add a few rows to calculate percentages.
Tip: leaving labels blank is fine. Values can be decimals. Total of 0 means percentages are undefined.