math
posted by michele .
The ratio of red jelly beans to yellow jelly beans in a dish is 3.4. If Greg eats 3 red ones and 6 yellow ones, the ratio is 4.5. How many yellow jelly beans were originally in the dish?
Do you make 3.4 a fraction and 4.5 a fraction and times them? 3/6 TIMES 4.5 = 12/20 THEN SUBTRACT 6 yellow ones?

Ratios are written 3:4, not 3.4
Initially,
r/y = 3/4
Later,
(r3)/(y6) = 4/5
Solve those two equations to get
r=27, y=36
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