Find fractions, decimals & percentages of given amounts

e.g., 65% of 24 as 50% of 24 is 12, 10% of 24 is 2.4, and 5% is 1.2 so 12 + 2.4 + 1.2 = 15.6

• Finding equivalent ratios with a common factor,

e.g., 21:28 as ?? :8 as 21:28 is 3:4 so 6:8 e.g.,18/27 = 2/3 so 2/3 = 10/15

• Finding a multiplier between the units,

e.g., 18 out of 27 as 10 out of 15 by multiplying 15 by 2/3