Question

on saturday mrs. smith used 30/100kg of sugar baking apple pies and 4/10kg of sugar baking muffins. how much sugar did mrs. smith use in all?

Explanation:

Step1: Convert to common denominator

$\frac{4}{10} = \frac{40}{100}$

Step2: Add the sugar amounts

$\frac{30}{100} + \frac{40}{100} = \frac{70}{100}$

Step3: Simplify the fraction

$\frac{70}{100} = \frac{7}{10}$

Answer:

$\frac{7}{10}$ kg (or 0.7 kg)