Babita bought 160 kg mangoes=₹48 per kgSo, total amount she paid=₹48×160=₹7680She sold 70% of mangoes at ₹ 70 per kg.∴Cost of 70% mangoes=160×70100×70=70×16×7=₹ 7840Remaining mangoes=(100−70)%=30%Cost of remaining at ₹ 40 per kg=160×30100×40=16×3×40=₹ 1920Total amount received after selling mangoes=₹7840+₹1920=₹9760∴SP>CP, so there is a gain.Gain=SP−CP=₹9760−₹7680=₹2080∴Gain%=GainCP×100∴Gain%=20807680×100=27.08%