21 divided by 5 is 4 with a remainder of 1, or 4.2 as a decimal. In symbols: 21 ÷ 5 = 4.2.
| Form | Answer |
|---|---|
| Quotient and remainder | 4 remainder 1 |
| Decimal | 4.2 |
| Fraction | 21/5 |
| Mixed number | 4 1/5 |
| Percent | 420% |
Ask how many times 5 fits into 21. 5 × 4 = 20, and 5 × 5 = 25 is too big, so 5 goes into 21 exactly 4 times with 21 − 20 = 1 left over.
The remainder 1 is 1/5 of another 5, and 1 ÷ 5 = 0.2. So 21 ÷ 5 = 4 + 0.2 = 4.2.
Multiply back: 4 × 5 + 1 = 20 + 1 = 21. ✓
| Division | Answer |
|---|---|
| 20 ÷ 5 | 4 |
| 22 ÷ 5 | 4 R 2 |
| 21 ÷ 4 | 5 R 1 |
| 21 ÷ 6 | 3 R 3 |
| 19 ÷ 5 | 3 R 4 |
| 23 ÷ 5 | 4 R 3 |
| 42 ÷ 5 | 8 R 2 |
| 21 ÷ 10 | 2 R 1 |
See also: factors of 21.
Other numbers? Browse all division answers, the multiplication table or the fraction calculator.