Fill in the blanks.
Charlie has 20% less stickers than Adam and
Bryan has 50% less stickers than Charlie.

1. Who is the repeated identity? Give the answer in number.  (Eg Charlie = 1; Adam = 2; Bryan = 3)
2. Number of stickers that Bryan has = _____ u
3. Total number of stickers = _____ u
4. Difference in the number of stickers between Adam and Bryan = _____ u

(a)
Change percentage into units.

Charlie has 20% less stickers than Adam.

100% - 20% = 80%
80% = ⁸⁰₁₀₀ = ⁴₅
Charlie has ⁴₅ as many as stickers as Adam.

Bryan has 50% less stickers than Charlie.

100% - 50% = 50%
50% = ⁵⁰₁₀₀ = ¹₂

Bryan has ¹₂ as many as stickers as Charlie.

Number of Charlie's stickers is compared to the number of Adam's stickers.
Number of Charlie's stickers is compared to the number of Bryan's stickers.

(1) Charlie is the repeated identity.

Charlie	Adam	Bryan
4x1	5x1
2x2		1x2
4 u	5 u	2 u

(b)
LCM of 4 and 2 = 4

Number of stickers that Bryan has = 2 u

(c)
Total number of stickers that the children have
= 4 u + 5 u + 2 u
= 11 u

(d)
Difference in the number of stickers between Adam and Bryan
= 5 u - 2 u
= 3 u

Answer(s): (a) 1; (b) 2; (c) 11; (d) 3