The percentage of the income which was spent on clothing, education of children and transport together is:

From above graph , we have
Expenditure on clothing = 10%
Expenditure on education of children = 12%
Expenditure on transport = 5%
∴ Total Expenditure = Expenditure on clothing + Expenditure on education of children + Expenditure on transport
Total Expenditure = 10% + 12% + 5% = 27%