Timeline for What is the explanation for why comparing fractions by cross-multiplying works?
Current License: CC BY-SA 4.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| 16 hours ago | comment | added | gidds | I think the implication goes both ways only if you also require b and d to be non-zero. | |
| 18 hours ago | history | answered | Daniel R. Collins | CC BY-SA 4.0 |