Dante and Mia have 350 pennies in their piggy banks, altogether. After Dante lost half of his pennies and Mia lost one third of her pennies, they both had an equal amount of pennies left. How many pennies did they lose altogether?

In total they both lost 150 pennies.

Step-by-step explanation:

Since Dante and Mia have 350 pennies in their piggy banks, altogether, and after Dante lost half of his pennies and Mia lost one third of her pennies, they both had an equal amount of pennies left, to determine how many pennies did they lose altogether the following calculation must be performed:

350 = 200 + 150

200 - (200/2) = 200 - 100 = 100

150 - (150/3) = 150 - 50 = 100

Therefore, in total they both lost 150 pennies.