21 divided by 8 is 2 with a remainder of 5, or 2.625 as a decimal. In symbols: 21 ÷ 8 = 2.625.
| Form | Answer |
|---|---|
| Quotient and remainder | 2 remainder 5 |
| Decimal | 2.625 |
| Fraction | 21/8 |
| Mixed number | 2 5/8 |
| Percent | 262.5% |
Ask how many times 8 fits into 21. 8 × 2 = 16, and 8 × 3 = 24 is too big, so 8 goes into 21 exactly 2 times with 21 − 16 = 5 left over.
The remainder 5 is 5/8 of another 8, and 5 ÷ 8 = 0.625. So 21 ÷ 8 = 2 + 0.625 = 2.625.
Multiply back: 2 × 8 + 5 = 16 + 5 = 21. ✓
| Division | Answer |
|---|---|
| 20 ÷ 8 | 2 R 4 |
| 22 ÷ 8 | 2 R 6 |
| 21 ÷ 7 | 3 |
| 21 ÷ 9 | 2 R 3 |
| 19 ÷ 8 | 2 R 3 |
| 23 ÷ 8 | 2 R 7 |
| 42 ÷ 8 | 5 R 2 |
See also: factors of 21.
Other numbers? Browse all division answers, the multiplication table or the fraction calculator.