Question 1

How to find a percentage of a number?

Accepted Answer

Multiply the number by the percentage and divide by 100. For example, 15% of 50,000 = 50,000 × 15 / 100 = 7,500. In the calculator, select the 'X% of number' mode.

Question 2

How to find what percentage one number is of another?

Accepted Answer

Divide the part by the whole and multiply by 100. For example, 7,500 out of 50,000 = (7,500 / 50,000) × 100 = 15%. Use the 'Part of whole' mode.

Question 3

How to calculate a number after a percentage change?

Accepted Answer

New value = original × (1 + percentage / 100). Increasing by 20%: 50,000 × 1.2 = 60,000. Decreasing by 15%: 50,000 × 0.85 = 42,500. Use the 'Change by %' mode — enter a negative percentage for a decrease.

Question 4

How to calculate the percentage change between two numbers?

Accepted Answer

Percentage change = (new − old) / |old| × 100. For example, from 50,000 to 62,500 = (62,500 − 50,000) / 50,000 × 100 = +25%. Use the 'Change in %' mode.

Question 5

How to subtract VAT from a VAT-inclusive amount?

Accepted Answer

Amount without VAT = amount with VAT / (1 + rate/100). For 12% VAT: divide by 1.12. For example, 112,000 / 1.12 = 100,000. Use the VAT calculator on Solvix for this.

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