Subtract 30/70 from 21/16, Solve 1 5/16

Subtract 30/70 from 21/16

1^st number: 1 5/16, 2^nd number: 30/70

21/16 - 30/70 is 99/112.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 70 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 16 × 35 = 560,
21/16 = 21 × 35/16 × 35 = 735/560
Likewise, for the 2nd fraction, since 70 × 8 = 560,
30/70 = 30 × 8/70 × 8 = 240/560
Subtract the two like fractions:
735/560 - 240/560 = 735 - 240/560 = 495/560
After reducing the fraction, the answer is 99/112

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