Przedstaw liczbę w postaci ułamka zwykłego 0.3(7)
0,3(7) = 3,(7) : 10 = ....
3,(7) = x /* 10
3,77.. * 10 = x * 10
37,77. = 10x / - x
37,77... - 3,77.. = 10x - x
34 = 9x
x = 34/9
0,3(7) = 3,(7) : 10 = 34/9 * 1/10 = 34/90
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0,3(7) = 3,(7) : 10 = ....
3,(7) = x /* 10
3,77.. * 10 = x * 10
37,77. = 10x / - x
37,77... - 3,77.. = 10x - x
34 = 9x
x = 34/9
0,3(7) = 3,(7) : 10 = 34/9 * 1/10 = 34/90