Question

P:Q=3:5 and Q:R=4:7 workout the value of p:q:r

Answer 1

12:20:35

Explanation:

common factor of Q so I would assume

times both sides to establish Q as a common factor

3:5 times by 4 = 12:20

4:7 times by 5 = 20:35

p:q:r = 12:20:35

PS its 2:51 am so dont judge if I have misinterpreted the question

Answer 2

Explanation:

LCM of 5 and 4 ( the Q values) = 20

So we make both Q values = 0 and multiply the other to values as follows:

3*4 : 5*4 and 4*5 : 7*5

= 12:20:35.