20% of A equals 36. In a equation, that should look like this 0.20×A=36
Divide both sides by 0.20 and you get 180
Same as letter B
0.15×B=30
Divide both sides by 0.15 and you get B = 200
So B - A is equal to 200 - 180
Which is 20.
I hope this helps.
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