1- Click a percentage on the Choose Percentage menu at the left to select the drill you wish to practice 2- Mentally choose one of the flash cards below and calculate the answer 3- Click the numbers on the card to view the correct answer
Choose Percentage
20% of 10
20% of 20
20% of 30
20% of 40
20% of 50
20% of 60
20% of 70
20% of 80
20% of 90
20% of 100
20% of 110
20% of 120