Subtract 45/80 from 30/60
30/60 - 45/80 is -1/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 60 × 4 = 240,
30/60 = 30 × 4/60 × 4 = 120/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
45/80 = 45 × 3/80 × 3 = 135/240 - Subtract the two like fractions:
120/240 - 135/240 = 120 - 135/240 = -15/240 - After reducing the fraction, the answer is -1/16
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