Multiply the whole number by the denominator and add it to the numerator. 2x8=16 16+3=19 so the answer is 19 8ths.
2 + 3/8 change 2 to 8ths 16/8 ( which is another form of 2 ) 16/8 + 3/8 = 19/8 or 2 and 3/8 as a mixed number
To change a mixed number to scientific notation, convert the mixed number to a decimal. 309 and 3/4 = 309.75 = 3.0975 x 10^2
12 and 1/2
11 1/2
2 and 1/100
3/2
2 and 3 over 10
2 2/3
Change them into improper fractions. Invert the second fraction and multiply them together. Reduce if necessary.
2 and 9/25
2 and 3 over 100
2 and 1/4