Adam has 330 stickers.
²₃ of the stickers are sold in the morning.
⁹₁₀ of the remaining stickers are sold in the afternoon.
How many more stickers are sold in the afternoon than what are left?
Fraction of stickers left in the morning
= 1 - ²₃

= ¹₃

¹₃ of total stickers = ¹⁰₁₀ of remaining stickers

Make the numerators the same.
LCM of 1 and 10 is 10.

^{1 x 10} _{3 x 10} of total stickers = ^{10 x 1}_{10 x 1} of remaining stickers
¹⁰₃₀ of total stickers = ¹⁰₁₀ of remaining stickers

Total number of stickers at first = 30 u
Total number of stickers after selling some in the morning = 10 u

Number of stickers sold in the morning = 30 u - 10 u = 20 u
Number of stickers sold in the afternoon = 9 u
Number of stickers left = 10 u - 9 u = 1 u

30 u = 330

1 u = 330 ÷ 30 = 11

Number of more stickers sold in the afternoon than what is left
= 9 u - 1 u
= 8 u
= 8 x 11
= 88

Answer(s): 88