The total amount that Victor Malaba spends on food, car payment, rent, and savings is,
tc = $150 + $244 + $300 + $50 = $744
This means that he has $1240 - $744 = $496 left to spend for other things. The percentage equivalent for this amount is calculated below,
($496 / $1240) x 100% = 40%
Thus, he has 40% of his net income left for other stuffs.