Subtract 2/80 from 42/45
42/45 - 2/80 is 109/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
42/45 = 42 × 16/45 × 16 = 672/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
2/80 = 2 × 9/80 × 9 = 18/720 - Subtract the two like fractions:
672/720 - 18/720 = 672 - 18/720 = 654/720 - After reducing the fraction, the answer is 109/120
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