Fractions · tenths
What Is 4/10?
4/10 is four tenths: 4 parts out of 10 equal parts.
4/10 means 4 out of 10 equal parts. The bottom number (10) says how many equal parts make the whole. The top number (4) says how many you have. As a decimal it's 0.4, and as a percent it's 40%.
4/10 in pictures
4/10 at a glance
| In words | four tenths |
| As a decimal | 0.4 |
| As a percent | 40% |
| Simplest form | 2/5 |
| Equal fractions | 2/5, 6/15, 8/20, 10/25 |
| Compared to one half | smaller than 1/2 |
| Left to make a whole | 6/10 |
Is 4/10 in simplest form?
Both 4 and 10 divide by 2: 4 ÷ 2 = 2 and 10 ÷ 2 = 5. So 4/10 simplifies to 2/5, and the two are the same amount of pie.
Fractions equal to 4/10
Multiply the top and bottom by the same number and the amount doesn't change: 4 × 2 = 8 and 10 × 2 = 20, so 4/10 = 8/20. Times 3 gives 12/30. In the bakery, that's the same pie with every slice cut in two, then in three.
More fractions equal to 4/10: 2/5, 6/15, 8/20, 10/25, 12/30. The equivalent fractions lesson shows why this always works.
Is 4/10 bigger than one half?
4/10 is smaller than 1/2. One half of 10 parts is 5, and 4/10 has 4, which is fewer. Next to its neighbors: 3/10 < 4/10 < 5/10.
4/10 in real life
Share the 20 into 10 equal groups: 20 ÷ 10 = 2 in each group. Take 4 groups: 2 × 4 = 8.
An hour has 60 minutes. 60 ÷ 10 = 6, and 6 × 4 = 24 minutes.
Cut into fifths, then halve each fifth. This is why tenths and fifths are such close friends.
Common mix-ups with 4/10
Swapping the numbers changes everything. 4/10 is less than one whole; 10/4 is more than one whole. The bottom number always says how many equal parts make up the whole.
A pie with 4 filled and 6 empty is not 4/6. That compares the filled part to the empty part. The bottom number counts all 10 parts, filled or not.
Play with 4/10
Saying a definition doesn't make it stick. Finding 4/10 on a pie, a cake and a number line, over and over, does.
The orders in this game keep coming back to 4/10
Free to play · no signup · works on phones, tablets and computers
4/10 FAQ
What is 4/10 as a decimal?
4/10 = 0.4. Divide the top by the bottom: 4 ÷ 10 = 0.4.
What is 4/10 as a percent?
4/10 is 40%. Percent means "out of 100", so work out 4 ÷ 10 × 100.
What fractions are equal to 4/10?
2/5, 6/15, 8/20, 10/25, 12/30 and many more. Multiply the top and bottom by the same number to make another.
How do you read 4/10 out loud?
Say "four tenths".
Is the fraction game really free?
Yes. The whole game plays free in your browser, with no signup, no ads and no time limit. A Fraction Bakery app for iPhone is coming later, but the web game stays free.
Take the bakery with you, soon
A Fraction Bakery app for iPhone is on the way. The plan: offline play for the car, a parent report of which fractions have stuck, and the full bakery shelf of prizes. Until then, the whole game is free right here.
Coming soon on theApp Store