Three names for the same number
A fraction, a decimal and a percent can all describe the same value. Learning to slide between them makes a huge slice of math feel calmer.
Fractions
The top number, the numerator, says how many parts you have. The bottom number, the denominator, says how many equal parts the whole is divided into.
3/4 means: split a thing into 4 equal parts and take 3 of them.
Decimals
A decimal extends place value past the ones place. The first digit after the dot is tenths, the next is hundredths, and so on.
0.75 = 7 tenths + 5 hundredths = 75/100.
Percentages
Percent means “out of 100.” A percent is just a fraction with denominator 100, written with a % sign.
75% = 75/100 = 0.75.
How to convert
Fraction → Decimal: divide top by bottom.
Decimal → Percent: multiply by 100, add %.
Percent → Fraction: drop the %, put it over 100, simplify.
Common equivalents to memorize
Hands-on tools
Pick a tool, drag a slider, and watch the numbers update.
Compare two fractions
Slide either fraction. The longer bar is the larger value.
Pie slicer
A pie chart of 1/4 — see the same fraction as a decimal and a percent.
Triple converter
Type into any one of the three boxes. The other two update with worked steps.
Discount & tip playground
Try a coupon, a sales tax, or a tip — see the math broken down.
Add two fractions
Different denominators? The tool finds a common one and shows every step.
Quiz
Flashcards
Tap a card to flip. Use ← / → keys to step through.
Daily challenge
A new problem every day. Same problem for everyone, worldwide. Build a streak — one shot per day.
For teachers
Print-ready worksheet, answer key, teaching tips and standards alignment. Generate a fresh worksheet whenever you need one.
Teaching tips
Standards alignment
Reference
Formula sheet plus a small photo gallery from Wikipedia.
Formula sheet
Photo gallery
Images sourced from Wikipedia.