Shop B sold the TV at 100u

Shop A sold the TV at 80u

80u = $1360

(a) 100u = $1360 ÷ 80 × 100 = $1700

Both shops sold the TV at the same discount rate.

1700p – 1360p = 258.40

340p = 258.40

p = 0.76

Percentage discount given by the shops -> (1 – 0.76) × 100 = 24%