Subtract 30/50 from 72/90
72/90 - 30/50 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
72/90 = 72 × 5/90 × 5 = 360/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
30/50 = 30 × 9/50 × 9 = 270/450 - Subtract the two like fractions:
360/450 - 270/450 = 360 - 270/450 = 90/450 - After reducing the fraction, the answer is 1/5
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