Subtract 70/40 from 42/72
1st number: 42/72, 2nd number: 1 30/40
42/72 - 70/40 is -7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Subtract the two like fractions:
210/360 - 630/360 = 210 - 630/360 = -420/360 - After reducing the fraction, the answer is -7/6
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