Subtract 7/80 from 42/49
42/49 - 7/80 is 431/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 49 × 80 = 3920,
42/49 = 42 × 80/49 × 80 = 3360/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
7/80 = 7 × 49/80 × 49 = 343/3920 - Subtract the two like fractions:
3360/3920 - 343/3920 = 3360 - 343/3920 = 3017/3920 - After reducing the fraction, the answer is 431/560
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