Decimals & PercentsHESI A2 cheat sheet

Converting and computing

8 key facts 2 practice questions Reviewed Oct 2026

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Conversions

Decimal → percent: ×100 (move the point two right)
Percent → decimal: ÷100 (two left)
Fraction → decimal: divide top by bottom

Percent Problems

part / whole = percent / 100
'Of' means multiply: 30% of 60 = 0.30 × 60 = 18

Decimal Arithmetic

Align the points to add or subtract
Count total decimal places when multiplying

Common Equivalents

1/2 = 0.5 = 50% · 1/4 = 0.25 = 25% · 1/3 ≈ 0.333 = 33⅓%

Key takeaway

Converting and computing

Before you read

Test yourself first: 2 questions

Question 1 of 2

What is 3.2 + 4.75?

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