A pharmacist has a 2500g of 10 zinc oxide ointment and neede

A pharmacist has a 2500g of 10% zinc oxide ointment and needed to increase the strength of the ointment to 25% of zinc oxide

How many grams of Zinc Oxide should be added?

What is the total amount of the final ointment?

Solution

currently 10% zinc oxide is there = 10% of2500g = 250 gms

25% of zinc oxide = 25% of2500 = 625

Sice, 250 gms is already thee.Hence, 375 gms extra shouldbe aded.