HESI Math Practice Concepts and Conversions

Vocabulary and core mathematical principles, conversions, and operational rules from the HESI 2026 Math review.

Comparing Fractions with Equal Numerators

When numerators are the same, the fraction with the smallest denominator has the largest value because the whole is divided into fewer parts.

Converting A.M. Time to Military Time

Drop the "A.M.". If the hour is $12\,\text{A.M.}$, it becomes $00$; for any other A.M. hour, write it as a two-digit number.

Gallon to Fluid Ounces Conversion

$1\,\text{gallon}$ equals $128\,\text{fluid ounces}$.

Kilometer to Meters Conversion

$1\,\text{kilometer}$ equals $1000\,\text{meters}$.

Percent to Decimal Conversion

To convert a percent to a decimal, divide the percentage value by $100$.

Pint to Fluid Ounces Conversion

$1\,\text{pint}$ equals $16\,\text{fluid ounces}$.

Fraction to Decimal Conversion

To convert a fraction to a decimal, divide the numerator by the denominator.

Subtracting Fractions with Common Denominators

Subtract the numerators and keep the denominator unchanged, then simplify if applicable.

Multiplying Fractions

Multiply the numerators together and multiply the denominators together, then simplify to lowest terms.

Converting Afternoon Military Time to Standard Time

Subtract $1200$ from the military time value to get the standard P.M. time hour.

Military Time Between 0000 and 0059

Represents minutes directly after midnight, which converts to $12:\text{XX}\,\text{A.M.}$ in standard 12-hour time.

Inches to Feet Conversion

There are $12\,\text{inches}$ in $1\,\text{foot}$. Divide the total number of inches by $12$ to determine feet.

Gram to Milligram Conversion

$1\,\text{gram}$ equals $1000\,\text{mg}$.