#1111 · Number Theory · Digits
Septenary to vulgar fraction
Express the septenary (base‑7) fraction as a reduced vulgar fraction in the common decimal (base‑10) system.
H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. VII. Scales of Notation, Examples VII.b, No. 18
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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).