proportionality

[spiral shadow]

Part B

[mint spindle]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with: ```diff
   +close

[spiral shadow]

Can someone please Help

[light hound]

,rotate

[light hound]

1. percentage of green balls = 2/5 ×100 = 40%
   → Red balls = 10%
   Therefore, Yellow balls = 50%

2. 50% of total balls (let x) are yellow, and there are 30 yellow balls.
   → 1/2(x) = 30
   → x = 60
   Therefore, total balls = 60