Tom bought a pen for $60 and sold it to gain 20% on his cost price. How
much money did he gain?

72$

Step-by-step explanation:

20%=.2

60x.2=12

60+12=72

OR

60x1.2=72

Basically you are finding 20% of the original price (in this case 60) and then adding that 20% to the original number so you will make a 20% profit.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

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