Subtract 21/45 from 21/16, Solve 1 5/16

Subtract 21/45 from 21/16

1^st number: 1 5/16, 2^nd number: 21/45

21/16 - 21/45 is 203/240.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 45 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 16 × 45 = 720,
21/16 = 21 × 45/16 × 45 = 945/720
Likewise, for the 2nd fraction, since 45 × 16 = 720,
21/45 = 21 × 16/45 × 16 = 336/720
Subtract the two like fractions:
945/720 - 336/720 = 945 - 336/720 = 609/720
After reducing the fraction, the answer is 203/240

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