Answer: 1.79 ounces
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Work Shown:
(1 ounce)/(28 grams) = (x ounces)/(50 grams)
1/28 = x/50
1*50 = 28*x
50 = 28x
28x = 50
x = 50/28
x = 1.78571428571429 which is approximate
x = 1.79
50 grams is approximately equal to 1.79 ounces
Side note: The true value is closer to 1.7636981 ounces (since that figure of 28 grams should be more about 28.3495231); however, we'll stick to the numbers your teacher gave you.