90% of Tiffany's amount was $1188 more than George's amount. When Tiffany spent 55% of her amount and George spent 35% of his amount, they had the same amount of amount left. Find the amount that George had at first.

	90% of Tiffany's amount	Tiffany's amount	George's amount
Before	234 u	260 u	180 u
Change		- 143 u (- 55%)	- 63 u (- 35%)
After		117 u	117 u

Percentage of Tiffany's amount left
= 100% - 55%
= 45%

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

45% = ⁴⁵₁₀₀ = ⁹₂₀
65% = ⁶⁵₁₀₀ = ¹³₂₀

The amounts of amount that Tiffany and George had left were the same.
Make the numerators the same.

⁹₂₀ of Tiffany's amount = ¹³₂₀ of George's amount
¹¹⁷₂₆₀ of Tiffany's amount = ¹¹⁷₁₈₀ of George's amount

Amount that Tiffany had = 260 u

90% of the amount that Tiffany had
= 260 u x 90%
= 260 u x ⁹⁰₁₀₀
= 234 u

Difference between 90% of Tiffany's amount and George's amount
= 234 u - 180 u 
= 54 u

54 u = 1188
1 u = 1188 ÷ 54 = 22

Amount that George had at first
= 180 u
= 180 x 22
= $3960

Answer(s): $3960