Miko and Keddy shared 210 stamps in the ratio 2 : 5. How many more stamps did Keddy have?
\(M : K\) \( : M+K\)
\(2 \) \(:\) \(5\) \(: 7\)
They have 210 so
\(M:K:210 \)
\(2 : 5 : 7\)
"How many stamps did Keddy have?"
Keddy, K is 5*210/7 =150 stamps
....and
Miko has 2/7 * 210 = 60 stamps
So K has 150-60 = 90 MORE stamps than M
Another way total stamps = 210
K has (5-2)/7 = 3/7 more stamps 3/7 x 210 = 90 more stamps
