Calculating Two Thirds of a Number

Fractions can take two forms, and whichever form you use, you can use your calculator or your notepad to find two-thirds of a number. For example, you can write two-thirds in fractional form – 2/3 – or as a decimal – 0.667 – and either way, you calculate two-thirds of a number by multiplying by that number. The operations are equivalent, although if you’re using your notepad, you may prefer to use the fractional form.

By Calculator

Step 1

Type in two divided by three and press the equals sign on your calculator. You should receive a decimal similar to 0.666 repeating.

Step 2

Press the multiplication sign and type in the number of interest. For example, if you are finding two-thirds of 100, after you press multiplication sign type in “100.” Then press the equals sign.

Step 3

Interpret your result. If you have 66.66 repeating, then you may wish to round this to the tenths place of 66.7. Thus, two-thirds of 100 is approximately 66.7.