Subtract 90/40 from 42/45
1st number: 42/45, 2nd number: 2 10/40
42/45 - 90/40 is -79/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
42/45 = 42 × 8/45 × 8 = 336/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Subtract the two like fractions:
336/360 - 810/360 = 336 - 810/360 = -474/360 - After reducing the fraction, the answer is -79/60
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