Subtract 72/4 from 40/70
1st number: 40/70, 2nd number: 18 0/4
40/70 - 72/4 is -122/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
40/70 = 40 × 2/70 × 2 = 80/140 - Likewise, for the 2nd fraction, since 4 × 35 = 140,
72/4 = 72 × 35/4 × 35 = 2520/140 - Subtract the two like fractions:
80/140 - 2520/140 = 80 - 2520/140 = -2440/140 - After reducing the fraction, the answer is -122/7
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