Subtract 21/30 from 70/40
1st number: 1 30/40, 2nd number: 21/30
70/40 - 21/30 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
70/40 = 70 × 3/40 × 3 = 210/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Subtract the two like fractions:
210/120 - 84/120 = 210 - 84/120 = 126/120 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
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