21*.1=2.1
21/10 = 2.1
what percentage is 10/21
21 over 10 as a mixed number is 21/10
10/21
21 x 10 = 210
21 + 10 = 31
10
1000000000000000000000 It is 10 with 21 zeroes.
-21
21 multiply by 10 = 210
10^21 = 1,000,000,000,000,000,000,000
5/7 - 5/21 = 15/21 - 5/21 = 10/215/7 - 5/21 = 15/21 - 5/21 = 10/215/7 - 5/21 = 15/21 - 5/21 = 10/215/7 - 5/21 = 15/21 - 5/21 = 10/21