Subtract 72/90 from 4/50
4/50 - 72/90 is -18/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
4/50 = 4 × 9/50 × 9 = 36/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
72/90 = 72 × 5/90 × 5 = 360/450 - Subtract the two like fractions:
36/450 - 360/450 = 36 - 360/450 = -324/450 - After reducing the fraction, the answer is -18/25
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