How do write in simplest form given #7/10-2/15#?
In order to add or subtract fractions, we have to have common denominators.
List multiples of both numbers.
#10: 10,20,ul 30,40 ....#
# 15: 15,ul 30,45,60 ....#
Look for the smallest underlined number (known as the least common multiple, or LCM). This is your common denominator.
Multiply the numerator and denominator by the factor that it would take to get to your common denominator…like this:
Now we have both of our fractions with common denominators, so we can subtract! Remember, in a subtraction problem, the numerators subtract but the denominators stay the same. It looks like this:
A fraction consist of
You can not directly add or subtract the counts unless the size indicators are the same.