Question

grace, henry, and irene make sandwiches for a picnic. for every 20 sandwiches grace makes, henry makes 25, and irene makes 15. the ratio of number of sandwiches made by grace, henry, and irene when each works for 6 hours is : : .

Explanation:

Step1: Calculate Grace's total sandwiches

$20 \times 6 = 120$

Step2: Calculate Henry's total sandwiches

$25 \times 6 = 150$

Step3: Calculate Irene's total sandwiches

$15 \times 6 = 90$

Step4: Simplify the ratio

Find GCD of 120,150,90: 30.
$\frac{120}{30}:\frac{150}{30}:\frac{90}{30} = 4:5:3$

Answer:

$4:5:3$