You can't simplify 1242 unless it is a fraction.
an eqivalent ratio is an ratio that is equal or you can simplfiy it
yes you can simplify a mixed number b but only if the numerator and denominator can be divided
Very little - it simplified sending messages, but trade is basically a financial transaction of exchange-purchase-carriage, not writing.
2.25
You find a common factor between numerator and denominator. Then, you divide numerator and denominator between this factor. Continue, until there are no more common factors. Here are some examples: 4/10 - common factor is 2: 4/10 = (4/2) / (10/2) = 2/5. 12/18 - common factor is 6: 12/18 = (12/6) / (18/6) = 2/3. You don't need to figure out the greatest common factor: 60/80 = 6/8 = 3/4 (first I divided numerator and denominator by 10, then I continued searching for further factors; finding the factor 2). (x3 + 3x2) / 5x - divide by the common factor x, with the result (x2 + 3x) / 5.