Note: The codes below were not completely created by me. I had to do lots of research to copy, paste, and edit for clarity the codes below. The math codes were copied after I found them to work better than the others on the internet.

Or instead of using Python, you can just go to this website to get the answers to your GCF and LCD questions. I recommend this website due to the lack of advertisements.

https://www.calculators.org/math/least-common-multiple.php

Or if you decide to use Python, then highlight starting at print('') all the way to the end of this page. Then right-click on the mouse and click copy. Start Python Idle, click File, drop down to New File, and paste the codes. Next, click "Run," then "Run Module." Save it with any name you like. 

Find LCD/LCM and GCF of Two Numbers

print('')

print('The lowest common denominator (LCD) or least common multiple (LCM) is')

print('the lowest common multiple for a set of fractions or two numbers.')

print('It simplifies adding, subtracting, and comparing fractions.')

print('')

print('The greatest common factor (GCF) is the largest factor two or more numbers have in common.')

print('Greatest common factor is used to simplify fractions .')

print('')


# Python program to find LCD/LCM of two numbers

def compute_lcd(x, y):

# choose the greater number  

    if x > y:

        greater = x

    else:

        greater = y

    while(True):

        if((greater % x == 0) and (greater % y == 0)):

            lcd = greater

            break

        greater += 1

    return lcd


# Python program to find GCF of two numbers

# define a function

def compute_gcf(x, y):

# choose the smaller number

    if x > y:

        smaller = y

    else:

        smaller = x

    for i in range(1, smaller+1):

        if((x % i == 0) and (y % i == 0)):

            gcf = i 

    return gcf


print('Please enter two numbers to find their LCD/LCM and GCF.')

print('')


num1=int(input('Enter your 1st number: '))

num2=int(input('Enter your 2nd number: '))


print('')

print("The LCD/LCM for the two numbers you\'ve entered is", compute_lcd(num1, num2))

print("The GCF for the two numbers you\'ve entered is", compute_gcf(num1, num2))

print('')