Subtract 21/90 from 84/36
1st number: 2 12/36, 2nd number: 21/90
84/36 - 21/90 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
84/36 = 84 × 5/36 × 5 = 420/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Subtract the two like fractions:
420/180 - 42/180 = 420 - 42/180 = 378/180 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
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