4/5+8/9 what dose that = as a fraction too

You have to find the common denominator which is 45. 4x9=36 5x9=45 which means 36 over 45. Then 8x5=40 9x5=45 which means 40 over 45. Add the numerators: 36+40 = 76. So the answer is 76/45 and the decimal form is 1.68