80% of Barbara's amount was $396 more than Bobby's amount. When Barbara spent 60% of her amount and Bobby spent 35% of his amount, they had the same amount of amount left. Find the amount that Bobby had at first.

	80% of Barbara's amount	Barbara's amount	Bobby's amount
Before	52 u	65 u	40 u
Change		- 39 u (- 60%)	- 14 u (- 35%)
After		26 u	26 u

Percentage of Barbara's amount left
= 100% - 60%
= 40%

Percentage of Bobby's amount left
= 100% - 35%
= 65%

40% = ⁴⁰₁₀₀ = ²₅
65% = ⁶⁵₁₀₀ = ¹³₂₀

The amounts of amount that Barbara and Bobby had left were the same.
Make the numerators the same.

²₅ of Barbara's amount = ¹³₂₀ of Bobby's amount
²⁶₆₅ of Barbara's amount = ²⁶₄₀ of Bobby's amount

Amount that Barbara had = 65 u

80% of the amount that Barbara had
= 65 u x 80%
= 65 u x ⁸⁰₁₀₀
= 52 u

Difference between 80% of Barbara's amount and Bobby's amount
= 52 u - 40 u 
= 12 u

12 u = 396
1 u = 396 ÷ 12 = 33

Amount that Bobby had at first
= 40 u
= 40 x 33
= $1320

Answer(s): $1320