21 divided by 12 is 1 with a remainder of 9, or 1.75 as a decimal. In symbols: 21 ÷ 12 = 1.75.
| Form | Answer |
|---|---|
| Quotient and remainder | 1 remainder 9 |
| Decimal | 1.75 |
| Fraction | 21/12 = 7/4 |
| Mixed number | 1 3/4 |
| Percent | 175% |
Ask how many times 12 fits into 21. 12 × 1 = 12, and 12 × 2 = 24 is too big, so 12 goes into 21 exactly 1 times with 21 − 12 = 9 left over.
The remainder 9 is 9/12 of another 12, and 9 ÷ 12 = 0.75. So 21 ÷ 12 = 1 + 0.75 = 1.75.
Multiply back: 1 × 12 + 9 = 12 + 9 = 21. ✓
| Division | Answer |
|---|---|
| 20 ÷ 12 | 1 R 8 |
| 22 ÷ 12 | 1 R 10 |
| 21 ÷ 11 | 1 R 10 |
| 19 ÷ 12 | 1 R 7 |
| 23 ÷ 12 | 1 R 11 |
| 42 ÷ 12 | 3 R 6 |
See also: factors of 21.
Other numbers? Browse all division answers, the multiplication table or the fraction calculator.