At a fruit stall, 280 mangoes were sold in the morning and ⁵₇ of the remaining mangoes were sold in the afternoon. As a result, the number of mangoes left became ¹₆ of the total number of mangoes at first. Given that the mangoes were sold at $3.50 in packs of four mangoes, how much did the fruit stall receive from the sale of the mangoes in the afternoon?
Fraction of the remaining mangoes left
= 1 - ⁵₇
= ²₇

Make numerators the same.
²₇ of remaining mangoes = ¹₆ of total mangoes
²₇ of remaining mangoes = ²₁₂ of total mangoes

12 u - 7 u = 280
5 u = 280
1 u = 280 ÷ 5 = 56

Number of mangoes sold in the afternoon
= 5 u
= 5 x 56
= 280

Number of packs of four mangoes sold in the afternoon
= 280 ÷ 4
= 70

Amount received for mangoes sold in the afternoon
= 70 x 3.50
= $245

Answer(s): $245