Answer:
4 1/4 kg
Step-by-step explanation:
2 3/4 + 1 1/2
convert to have common denominators
2 3/4 + 1 2/4
convert to improper fractions (whole number × denominator + numerator / denominator)
11/4 + 6/4
add numerators and keep same denominator
17/4
convert to mixed number
17 goes into the denominator 4 times with 1 left over so:
4 1/4
