Practice · Grade 7 Foundations
Decimal to Percent — Practice
Practice problems for converting decimals to percentages: multiply by 100, move the point two places right. Hint and full working per question. Free.
Q1 of 6
0 correct
Convert 0.19 to a percent.
0.19 = ?%
Quick answer
How do I practise converting decimals to percentages?
Every problem uses the same rule: multiply by 100, i.e. move the point two places to the right, and add a percent sign. 0.19 · 100 = 19%. Drill the special cases on purpose: values above 1 (1.25 = 125%), very small values (0.004 = 0.4%), and numbers with few or many decimal places. To check, divide by 100 again and you should get the original number back.
HowTo
A 3-step solving strategy
This order works for any decimal — smaller or larger than 1.
- 1Step 1 of 4
Find the point and count two places right
Mark the point in the decimal. Multiplying by 100 means moving the point exactly two places to the right. If digits are missing, add zeros: 0.5 becomes 0.50, then 50.
- 2Step 2 of 4
Multiply by 100
Compute the value times 100. 0.19 · 100 = 19. Values above 1 give more than 100% (1.25 · 100 = 125); very small values give a fraction of a percent (0.004 · 100 = 0.4).
- 3Step 3 of 4
Add the percent sign
Write the result with %: 0.19 = 19%. In the answer field you only type the number — the percent sign is already shown next to it.
- 4Step 4 of 4
Check by dividing by 100
Divide your result by 100 again: 19% ÷ 100 = 0.19. If you get the original number back, the conversion is right.
Examples
Worked practice examples
Four typical decimals. Try each yourself first, then compare with the working.
Easy
0.19 to a percent
0.19 · 100
Point two places right
= 19%
Check: 19% ÷ 100 = 0.19 ✓
Base case with two decimal places: the point disappears cleanly.
Medium
0.075 to a percent
0.075 · 100
Point two places right
= 7.5%
Check: 7.5% ÷ 100 = 0.075 ✓
Three decimal places: one is left over after the shift.
Medium
1.25 to a percent
1.25 · 100
Point two places right
= 125%
Check: 125% ÷ 100 = 1.25 ✓
Value above 1 → more than 100%. Perfectly correct.
Hard
Boss: 0.0325 to a percent
0.0325 · 100
Point two places right
= 3.25%
Check: 3.25% ÷ 100 = 0.0325 ✓
Four decimal places: move exactly two, not one and not three.
Pitfalls
Common mistakes — and how to avoid them
These five traps show up again and again when converting decimal → percent.
Moving the point the wrong way
Decimal to percent moves the point right (0.19 → 19%). Left would be the reverse direction, percent back to decimal.
Moving only one place
Times 100 means two places, not one. 0.19 becomes 19%, not 1.9%. Count two places deliberately.
Unsure with values above 1
1.25 = 125% is correct. A decimal greater than 1 simply gives more than 100% — that is not a mistake.
Counting the leading zero
0.075 = 7.5%. The zero before the point doesn't count; only the decimal places shift.
Not treating missing places as zeros
0.5 is missing its second decimal place. Treat it as a zero (0.50), and the shift gives a clean 50%.
Study
Practise with a plan — three quick tips
15 minutes at a time, not 90
Three short sessions across three days stick better than one long session the night before the test. It's called spaced repetition.
Solve first, then check the answer
Move the point yourself before revealing the hint. Active recall is three to four times more effective for learning than passive reading.
Mix in the special cases on purpose
Don't drill only 0.xx values. Deliberately include values above 1 and very small values — that's where most careless errors happen.
FAQ
Frequently asked questions about practising
Glossary
Terms in one line
- Decimal
- A number with a point that gives a share of the whole (1), e.g. 0.19.
- Percent (%)
- A hundredth. 1% = 1 ÷ 100 = 0.01. The symbol % means "per hundred".
- Decimal place
- A digit to the right of the point. Their count decides how much is left after the shift.
- Factor 100
- The number you multiply by when converting decimal → percent.
- Point shift
- Multiplying by a power of ten moves the point; times 100 is two places to the right.
- The whole
- The value 1, which equals exactly 100%.
- Boss problem
- The last and hardest question of a practice set, combining a tricky special case.