Add 21/36 and 25/70
21/36 + 25/70 is 79/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 70 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 36 × 35 = 1260,
21/36 = 21 × 35/36 × 35 = 735/1260 - Likewise, for the 2nd fraction, since 70 × 18 = 1260,
25/70 = 25 × 18/70 × 18 = 450/1260 - Add the two like fractions:
735/1260 + 450/1260 = 735 + 450/1260 = 1185/1260 - 1185/1260 simplified gives 79/84
- So, 21/36 + 25/70 = 79/84
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