Add 25/45 and 8/21
25/45 + 8/21 is 59/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
8/21 = 8 × 15/21 × 15 = 120/315 - Add the two like fractions:
175/315 + 120/315 = 175 + 120/315 = 295/315 - 295/315 simplified gives 59/63
- So, 25/45 + 8/21 = 59/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45+8/21 25/45+16/21 25/90+8/21 25/45+8/42 75/45+8/21 25/45+24/21 25/45+8/63 25/45+40/21 25/45+56/21