Roberto’s monthly pay is $4349.70. each month he uses 2/5of his pay for his household expenses and 1/10 for his car payment. he deposits the rest into his savings account.
how much does roberto deposit into his savings account each month?

Roberto deposits $2,174.85 to his savings account each month.

Given:
Monthly pay = 4,349.70
Household expenses = 2/5 of his pay
Car payment = 1/10 of his pay
Savings = net of expenses.

Household expenses:
4,349.70 * 2/5 = 8,699.40/5 = 1,739.88

Car payment:
4,349.70 * 1/10 = 4,349.70/10 = 434.97

Monthly pay:                 4,349.70
less: Household exp.    1,739.88
less: Car payment           434.97
Net of expenses           2,174.85  *deposit to savings account