SEARCH HOME
 Math Central Quandaries & Queries
 Question from bianco, a student: 2/3+3/4= 9/8-6/8=

Hi,

To add or subtract fractions you need their denominators to be equal. The denominators in your second problem are equal and hence

$\frac98 - \frac68 = \frac{9 - 6}{8} = \frac38.$

For your first problem you will need to find a common denominator.

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.