Question

Which ratio forms a proportion with 15/21 ? 20/26, 7/5, 20/28, 12/8

Answer 1

15/21 simplified is \[\frac{15 \div 3}{21 \div 3} \implies \frac 57\]
so which one of those simplifies to 5/7?

Answer 2

Precisely what @@lgbasallote said.

Answer 3

20/28?

Answer 4

\[\frac{20 \div 4}{28 \div 4} \implies \frac 57\\ \textbf{congrats!!}\]

Answer 5

i mean 20/28

Answer 6

thanks :)
can you help me with another question?

Answer 7

Which expression simplifies to 6h^2√3h? sqrt36h^5, sqrt49h^3, sqrt108h^5, sqrt18h^3