Well 0.166666.... = 1/6. So 5.26666.... - 0.16666.... = 5.1 or 5 1/10. Now add 1/10 + 1/6 = 3/30 + 5/30 = 8/30 = 4/15. So as a mixed number it is 5 4/15, as an improper fraction 79/15.
There is a procedure for working out repeating decimals. The above method recognized what decimal represents 1/6, and found the entire decimal as combination of two fractions. Suppose you did not know what 1/6 was, but you know that 2/3 = 0.66666.... You can use that information. Divide both sides by 10: 2/30 = 0.066666.... So now you have 0.2 + 0.066666.... = 2/10 + 2/30 or 6/30 + 2/30 = 8/30 = 4/15, same as above.
123.45679 written as a fraction is 12345679/100000.
14.875 written as a fraction is 119/8.
3/16 is 0.1875 when written as a fraction.
5.4 written as a fraction in lowest terms = 27/5
7.32 written as a fraction in lowest terms = 183/25
0.05498 written as a fraction is 2749/5000
198 written in fraction = 198/1
123.45679 written as a fraction is 12345679/100000.
14.875 written as a fraction is 119/8.
0.135 written as fraction is 27/200
8/25 is 0.320 written as a fraction.
0.0005 written as a fraction is 1/2000.
3.085714286 written as a fraction = 3085714286/1000000000
73 written as a fraction = 73/1
130 written as a fraction is 130/1
2.625 written as a fraction is 21/8.
0.315 written as a fraction = 63/200