Subtract 16/30 from 42/80
42/80 - 16/30 is -1/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
42/80 = 42 × 3/80 × 3 = 126/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
16/30 = 16 × 8/30 × 8 = 128/240 - Subtract the two like fractions:
126/240 - 128/240 = 126 - 128/240 = -2/240 - After reducing the fraction, the answer is -1/120
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