Add 20/90 and 21/56
20/90 + 21/56 is 43/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
20/90 = 20 × 28/90 × 28 = 560/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
21/56 = 21 × 45/56 × 45 = 945/2520 - Add the two like fractions:
560/2520 + 945/2520 = 560 + 945/2520 = 1505/2520 - 1505/2520 simplified gives 43/72
- So, 20/90 + 21/56 = 43/72
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