We have to add 8/15 to 2/5.
To add two fractions we have to make them have the same denominator, so we have to convert 2/5 to have a denominator of 15. To do this, we have to multiply 2/5 by 3 and then we can add the fractions:

Answer: 14/15
2 3/5 or 2 6/10 is the answer
In scientific notation: 8.74*10^-7
Answer:
Step-by-step explanation:
8.012 x 10^-4