21 divided by 4 is 5 with a remainder of 1, or 5.25 as a decimal. In symbols: 21 ÷ 4 = 5.25.
| Form | Answer |
|---|---|
| Quotient and remainder | 5 remainder 1 |
| Decimal | 5.25 |
| Fraction | 21/4 |
| Mixed number | 5 1/4 |
| Percent | 525% |
Ask how many times 4 fits into 21. 4 × 5 = 20, and 4 × 6 = 24 is too big, so 4 goes into 21 exactly 5 times with 21 − 20 = 1 left over.
The remainder 1 is 1/4 of another 4, and 1 ÷ 4 = 0.25. So 21 ÷ 4 = 5 + 0.25 = 5.25.
Multiply back: 5 × 4 + 1 = 20 + 1 = 21. ✓
| Division | Answer |
|---|---|
| 20 ÷ 4 | 5 |
| 22 ÷ 4 | 5 R 2 |
| 21 ÷ 3 | 7 |
| 21 ÷ 5 | 4 R 1 |
| 19 ÷ 4 | 4 R 3 |
| 23 ÷ 4 | 5 R 3 |
| 42 ÷ 4 | 10 R 2 |
| 21 ÷ 8 | 2 R 5 |
See also: factors of 21.
Other numbers? Browse all division answers, the multiplication table or the fraction calculator.