Subtract 25/16 from 21/30
1st number: 21/30, 2nd number: 1 9/16
21/30 - 25/16 is -69/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
25/16 = 25 × 15/16 × 15 = 375/240 - Subtract the two like fractions:
168/240 - 375/240 = 168 - 375/240 = -207/240 - After reducing the fraction, the answer is -69/80
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