Tiontaigh 0.32 go codán:
0.32 = 32/100
Faigh an roinnteoir (gcd) is mó atá ag an uimhreoir agus ag an ainmneoir:
gcd (32,100) = 4
Laghdaigh an codán tríd an uimhreoir agus an t-ainmneoir a roinnt ar an gcd:
0.32 = (32/4) / (100/4) = 8/25
Tiontaigh 2.56 go codán:
2.56 = 2 + 56/100
Faigh an roinnteoir (gcd) is mó atá ag an uimhreoir agus ag an ainmneoir:
gcd (56,100) = 4
Laghdaigh an codán tríd an uimhreoir agus an t-ainmneoir a roinnt ar an gcd:
2 + 56/100 = 2 + (56/4) / (100/4) = 2 + 14/25
Tiontaigh 0.124 go codán:
0.124 = 124/1000
Faigh an roinnteoir (gcd) is mó atá ag an uimhreoir agus ag an ainmneoir:
gcd (124,1000) = 4
Laghdaigh an codán tríd an uimhreoir agus an t-ainmneoir a roinnt ar an gcd:
0.124 = (124/4) / (1000/4) = 31/250
Tiontaigh 0.333333 ... go codán:
x = 0.333333 ...
10 x = 3.333333 ...
10 x - x = 9 x = 3
x = 3/9 = 1/3
Tiontaigh 0.0565656 ... go codán:
x = 0.0565656 ...
100 x = 5.6565656 ...
100 x - x = 99 x = 5.6
990 x = 56
x = 56/990 = 28/495
| Deachúil | Codán |
|---|---|
| 0.00001 | 1/100000 |
| 0.0001 | 1/10000 |
| 0.001 | 1/1000 |
| 0.01 | 1/100 |
| 0.08333333 | 1/12 |
| 0.09090909 | 1/11 |
| 0.1 | 1/10 |
| 0.11111111 | 1/9 |
| 0.125 | 1/8 |
| 0.14285714 | 1/7 |
| 0.16666667 | 1/6 |
| 0.2 | 1/5 |
| 0.22222222 | 2/9 |
| 0.25 | 1/4 |
| 0.28571429 | 2/7 |
| 0.3 | 3/10 |
| 0.33333333 | 1/3 |
| 0.375 | 3/8 |
| 0.4 | 2/5 |
| 0.42857143 | 3/7 |
| 0.44444444 | 4/9 |
| 0.5 | 1/2 |
| 0.55555555 | 5/9 |
| 0.57142858 | 4/7 |
| 0.6 | 3/5 |
| 0.625 | 5/8 |
| 0.66666667 | 2/3 |
| 0.7 | 7/10 |
| 0.71428571 | 5/7 |
| 0.75 | 3/4 |
| 0.77777778 | 7/9 |
| 0.8 | 4/5 |
| 0.83333333 | 5/6 |
| 0.85714286 | 6/7 |
| 0.875 | 7/8 |
| 0.88888889 | 8/9 |
| 0.9 | 9/10 |
| 1.1 | 11/10 |
| 1.2 | 6/5 |
| 1.25 | 5/4 |
| 1.3 | 13/10 |
| 1.4 | 7/5 |
| 1.5 | 3/2 |
| 1.6 | 8/5 |
| 1.7 | 17/10 |
| 1.75 | 7/4 |
| 1.8 | 9/5 |
| 1.9 | 19/10 |
| 2.5 | 5/2 |
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