Answer:
Explanation:
If Oscar wants to spend and save the money he earns, and for every $7 he puts in his wallet he puts $3 in his savings, then you can calculate how much he spends and saves based on the money he earns.
For every $7 he puts in his wallet, he saves $3. This means that for every $7 + $3 = $10 he earns, he saves $3 and spends $7.
So, the ratio of his spending to savings is 7:3.
For example, if Oscar earns $20, you can calculate his spending and savings as follows:
Calculate how many sets of $10 are in $20. $20 ÷ $10 = 2 sets.
Multiply the number of sets by the spending-to-savings ratio:
Spending: 2 sets × $7 = $14
Savings: 2 sets × $3 = $6
So, if Oscar earns $20, he would spend $14 and save $6, following the 7:3 ratio for spending and saving.