Step: Finding the percentage of saving
Let, the total income of the man be Rs.100
If a man spends 70% of his income, then total expenses
=70100×100=Rs.70
Savings after his expenditure
= Income − Expenditure
=100−70=Rs.30
Hence, his savings in percent
=30100×100%
=30%
Hence, the man saved 30% of his total income.