Subtract 15/9 from 40/70
1st number: 40/70, 2nd number: 1 6/9
40/70 - 15/9 is -23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
15/9 = 15 × 70/9 × 70 = 1050/630 - Subtract the two like fractions:
360/630 - 1050/630 = 360 - 1050/630 = -690/630 - After reducing the fraction, the answer is -23/21
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