Subtract 21/80 from 70/35, Solve 2 0/35

Subtract 21/80 from 70/35

1^st number: 2 0/35, 2^nd number: 21/80

70/35 - 21/80 is 139/80.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 35 × 16 = 560,
70/35 = 70 × 16/35 × 16 = 1120/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560
Subtract the two like fractions:
1120/560 - 147/560 = 1120 - 147/560 = 973/560
After reducing the fraction, the answer is 139/80
In mixed form: 159/80

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